彩票概率计算题

醉月听花

随机设备产生20个随机数字 20个数字范围限定1•••••••80 求这20个数字之和的概率分布 他们的和值范围在210•••••809的概率是否等于范围在811••••1410的概率？ 这个概率值是多少？

醉月听花

随机产生的都是整数

mathtime

20 0% 21 0% 22 0% 23 0% 24 0% 25 0% 26 0% 27 0% 28 0% 29 0% 30 0% 31 0% 32 0% 33 0% 34 0% 35 0% 36 0% 37 0% 38 0% 39 0% 40 0% 41 0% 42 0% 43 0% 44 0% 45 0% 46 0% 47 0% 48 0% 49 0% 50 0% 51 0% 52 0% 53 0% 54 0% 55 0% 56 0% 57 0% 58 0% 59 0% 60 0% 61 0% 62 0% 63 0% 64 0% 65 0% 66 0% 67 0% 68 0% 69 0% 70 0% 71 0% 72 0% 73 0% 74 0% 75 0% 76 0% 77 0% 78 0% 79 0% 80 0% 81 0% 82 0% 83 0% 84 0% 85 0% 86 0% 87 0% 88 0% 89 0% 90 0% 91 0% 92 0% 93 0% 94 0% 95 0% 96 0% 97 0% 98 0% 99 0% 100 0% 101 0% 102 0% 103 0% 104 0% 105 0% 106 0% 107 0% 108 0% 109 0% 110 0% 111 0% 112 0% 113 0% 114 0% 115 0% 116 0% 117 0% 118 0% 119 0% 120 0% 121 0% 122 0% 123 0% 124 0% 125 0% 126 0% 127 0% 128 0% 129 0% 130 0% 131 0% 132 0% 133 0% 134 0% 135 0% 136 0% 137 0% 138 0% 139 0% 140 0% 141 0% 142 0% 143 0% 144 0% 145 0% 146 0% 147 0% 148 0% 149 0% 150 0% 151 0% 152 0% 153 0% 154 0% 155 0% 156 0% 157 0% 158 0% 159 0% 160 0% 161 0% 162 0% 163 0% 164 0% 165 0% 166 0% 167 0% 168 0% 169 0% 170 0% 171 0% 172 0% 173 0% 174 0% 175 0% 176 0% 177 0% 178 0% 179 0% 180 0% 181 0% 182 0% 183 0% 184 0% 185 0% 186 0% 187 0% 188 0% 189 0% 190 .0000000001% 191 .0000000001% 192 .0000000001% 193 .0000000001% 194 .0000000001% 195 .0000000001% 196 .0000000001% 197 .0000000001% 198 .0000000001% 199 .0000000001% 200 .0000000001% 201 .0000000002% 202 .0000000002% 203 .0000000002% 204 .0000000002% 205 .0000000002% 206 .0000000003% 207 .0000000003% 208 .0000000003% 209 .0000000003% 210 .0000000004% 211 .0000000004% 212 .0000000004% 213 .0000000005% 214 .0000000005% 215 .0000000006% 216 .0000000006% 217 .0000000007% 218 .0000000008% 219 .0000000009% 220 .0000000009% 221 .000000001% 222 .0000000011% 223 .0000000012% 224 .0000000013% 225 .0000000015% 226 .0000000016% 227 .0000000017% 228 .0000000019% 229 .0000000021% 230 .0000000023% 231 .0000000025% 232 .0000000027% 233 .0000000029% 234 .0000000032% 235 .0000000035% 236 .0000000038% 237 .0000000041% 238 .0000000045% 239 .0000000048% 240 .0000000053% 241 .0000000057% 242 .0000000062% 243 .0000000067% 244 .0000000073% 245 .0000000079% 246 .0000000086% 247 .0000000093% 248 .0000000101% 249 .0000000109% 250 .0000000118% 251 .0000000127% 252 .0000000138% 253 .0000000149% 254 .0000000161% 255 .0000000174% 256 .0000000188% 257 .0000000203% 258 .0000000219% 259 .0000000236% 260 .0000000255% 261 .0000000275% 262 .0000000296% 263 .0000000319% 264 .0000000344% 265 .000000037% 266 .0000000399% 267 .0000000429% 268 .0000000462% 269 .0000000497% 270 .0000000534% 271 .0000000574% 272 .0000000617% 273 .0000000663% 274 .0000000712% 275 .0000000765% 276 .0000000821% 277 .0000000881% 278 .0000000945% 279 .0000001014% 280 .0000001087% 281 .0000001165% 282 .0000001249% 283 .0000001338% 284 .0000001433% 285 .0000001535% 286 .0000001643% 287 .0000001758% 288 .0000001881% 289 .0000002012% 290 .0000002152% 291 .0000002301% 292 .0000002459% 293 .0000002627% 294 .0000002807% 295 .0000002998% 296 .0000003201% 297 .0000003417% 298 .0000003646% 299 .000000389% 300 .000000415% 301 .0000004425% 302 .0000004718% 303 .0000005029% 304 .0000005359% 305 .0000005709% 306 .0000006081% 307 .0000006475% 308 .0000006893% 309 .0000007337% 310 .0000007807% 311 .0000008306% 312 .0000008834% 313 .0000009394% 314 .0000009987% 315 .0000010615% 316 .000001128% 317 .0000011984% 318 .0000012729% 319 .0000013517% 320 .0000014351% 321 .0000015232% 322 .0000016165% 323 .0000017151% 324 .0000018193% 325 .0000019294% 326 .0000020457% 327 .0000021686% 328 .0000022984% 329 .0000024354% 330 .0000025801% 331 .0000027327% 332 .0000028938% 333 .0000030638% 334 .000003243% 335 .000003432% 336 .0000036313% 337 .0000038414% 338 .0000040628% 339 .0000042961% 340 .0000045419% 341 .0000048008% 342 .0000050734% 343 .0000053604% 344 .0000056626% 345 .0000059806% 346 .0000063152% 347 .0000066672% 348 .0000070375% 349 .0000074269% 350 .0000078363% 351 .0000082668% 352 .0000087192% 353 .0000091945% 354 .000009694% 355 .0000102187% 356 .0000107697% 357 .0000113484% 358 .0000119558% 359 .0000125935% 360 .0000132627% 361 .0000139649% 362 .0000147016% 363 .0000154743% 364 .0000162846% 365 .0000171343% 366 .0000180251% 367 .0000189587% 368 .0000199372% 369 .0000209624% 370 .0000220363% 371 .0000231612% 372 .0000243393% 373 .0000255727% 374 .000026864% 375 .0000282155% 376 .0000296299% 377 .0000311098% 378 .0000326579% 379 .0000342773% 380 .0000359707% 381 .0000377414% 382 .0000395925% 383 .0000415274% 384 .0000435495% 385 .0000456623% 386 .0000478697% 387 .0000501754% 388 .0000525834% 389 .0000550978% 390 .000057723% 391 .0000604632% 392 .0000633232% 393 .0000663076% 394 .0000694214% 395 .0000726696% 396 .0000760575% 397 .0000795906% 398 .0000832743% 399 .0000871147% 400 .0000911175% 401 .0000952892% 402 .0000996361% 403 .0001041649% 404 .0001088823% 405 .0001137956% 406 .0001189119% 407 .000124239% 408 .0001297845% 409 .0001355566% 410 .0001415635% 411 .0001478139% 412 .0001543167% 413 .0001610808% 414 .0001681159% 415 .0001754315% 416 .0001830378% 417 .0001909451% 418 .000199164% 419 .0002077055% 420 .0002165809% 421 .0002258019% 422 .0002353806% 423 .0002453292% 424 .0002556606% 425 .0002663878% 426 .0002775243% 427 .0002890841% 428 .0003010815% 429 .0003135311% 430 .0003264482% 431 .0003398483% 432 .0003537473% 433 .0003681619% 434 .0003831089% 435 .0003986057% 436 .0004146702% 437 .0004313208% 438 .0004485764% 439 .0004664564% 440 .0004849806% 441 .0005041696% 442 .0005240444% 443 .0005446265% 444 .000565938% 445 .0005880017% 446 .0006108408% 447 .0006344793% 448 .0006589417% 449 .000684253% 450 .0007104392% 451 .0007375265% 452 .0007655422% 453 .0007945139% 454 .00082447% 455 .0008554398% 456 .0008874531% 457 .0009205404% 458 .000954733% 459 .0009900629% 460 .001026563% 461 .0010642668% 462 .0011032087% 463 .0011434238% 464 .0011849479% 465 .001227818% 466 .0012720715% 467 .001317747% 468 .0013648836% 469 .0014135215% 470 .0014637018% 471 .0015154663% 472 .0015688579% 473 .0016239203% 474 .0016806981% 475 .001739237% 476 .0017995835% 477 .0018617851% 478 .0019258901% 479 .0019919482% 480 .0020600098% 481 .0021301262% 482 .00220235% 483 .0022767346% 484 .0023533346% 485 .0024322056% 486 .0025134041% 487 .0025969879% 488 .0026830158% 489 .0027715476% 490 .0028626442% 491 .0029563678% 492 .0030527814% 493 .0031519495% 494 .0032539373% 495 .0033588115% 496 .0034666398% 497 .0035774909% 498 .003691435% 499 .0038085432% 500 .0039288877% 501 .0040525422% 502 .0041795813% 503 .0043100809% 504 .004444118% 505 .004581771% 506 .0047231192% 507 .0048682433% 508 .0050172252% 509 .005170148% 510 .0053270957% 511 .0054881541% 512 .0056534096% 513 .0058229501% 514 .0059968648% 515 .0061752439% 516 .0063581789% 517 .0065457624% 518 .0067380883% 519 .0069352516% 520 .0071373486% 521 .0073444766% 522 .0075567343% 523 .0077742214% 524 .0079970387% 525 .0082252884% 526 .0084590736% 527 .0086984986% 528 .0089436688% 529 .0091946908% 530 .0094516722% 531 .0097147217% 532 .0099839492% 533 .0102594653% 534 .010541382% 535 .0108298121% 536 .0111248695% 537 .0114266692% 538 .0117353268% 539 .0120509592% 540 .012373684% 541 .0127036199% 542 .0130408862% 543 .0133856033% 544 .0137378924% 545 .0140978753% 546 .0144656747% 547 .0148414142% 548 .0152252178% 549 .0156172104% 550 .0160175176% 551 .0164262653% 552 .0168435804% 553 .0172695901% 554 .0177044221% 555 .0181482048% 556 .0186010667% 557 .0190631372% 558 .0195345455% 559 .0200154215% 560 .0205058953% 561 .0210060971% 562 .0215161576% 563 .0220362074% 564 .0225663772% 565 .0231067979% 566 .0236576003% 567 .0242189152% 568 .0247908734% 569 .0253736054% 570 .0259672415% 571 .026571912% 572 .0271877467% 573 .027814875% 574 .028453426% 575 .0291035284% 576 .0297653101% 577 .0304388988% 578 .0311244212% 579 .0318220035% 580 .0325317711% 581 .0332538485% 582 .0339883593% 583 .0347354264% 584 .0354951712% 585 .0362677145% 586 .0370531757% 587 .0378516729% 588 .038663323% 589 .0394882417% 590 .040326543% 591 .0411783396% 592 .0420437424% 593 .0429228609% 594 .0438158028% 595 .044722674% 596 .0456435785% 597 .0465786183% 598 .0475278937% 599 .0484915025% 600 .0494695405% 601 .0504621015% 602 .0514692767% 603 .0524911548% 604 .0535278225% 605 .0545793635% 606 .0556458592% 607 .056727388% 608 .0578240257% 609 .0589358454% 610 .0600629169% 611 .0612053073% 612 .0623630804% 613 .0635362971% 614 .0647250147% 615 .0659292875% 616 .0671491663% 617 .0683846984% 618 .0696359275% 619 .0709028938% 620 .0721856337% 621 .0734841799% 622 .0747985611% 623 .0761288024% 624 .0774749245% 625 .0788369443% 626 .0802148745% 627 .0816087236% 628 .0830184956% 629 .0844441905% 630 .0858858036% 631 .0873433258% 632 .0888167435% 633 .0903060385% 634 .0918111876% 635 .0933321632% 636 .0948689328% 637 .0964214589% 638 .0979896992% 639 .0995736062% 640 .1011731277% 641 .102788206% 642 .1044187785% 643 .1060647772% 644 .107726129% 645 .1094027553% 646 .1110945723% 647 .1128014907% 648 .1145234158% 649 .1162602473% 650 .1180118794% 651 .1197782007% 652 .1215590943% 653 .1233544376% 654 .1251641021% 655 .1269879539% 656 .1288258532% 657 .1306776543% 658 .1325432061% 659 .1344223512% 660 .1363149267% 661 .1382207637% 662 .1401396876% 663 .1420715176% 664 .1440160674% 665 .1459731445% 666 .1479425506% 667 .1499240815% 668 .1519175272% 669 .1539226716% 670 .1559392929% 671 .1579671632% 672 .160006049% 673 .1620557107% 674 .164115903% 675 .1661863747% 676 .1682668688% 677 .1703571226% 678 .1724568676% 679 .1745658295% 680 .1766837286% 681 .1788102791% 682 .1809451901% 683 .1830881649% 684 .1852389011% 685 .1873970911% 686 .1895624218% 687 .1917345747% 688 .1939132261% 689 .1960980469% 690 .1982887031% 691 .2004848552% 692 .2026861589% 693 .2048922648% 694 .2071028189% 695 .209317462% 696 .2115358303% 697 .2137575555% 698 .2159822646% 699 .21820958% 700 .2204391199% 701 .2226704981% 702 .2249033244% 703 .2271372043% 704 .2293717394% 705 .2316065274% 706 .2338411622% 707 .236075234% 708 .2383083297% 709 .2405400325% 710 .2427699224% 711 .2449975762% 712 .2472225676% 713 .2494444674% 714 .2516628437% 715 .2538772616% 716 .256087284% 717 .2582924713% 718 .2604923814% 719 .2626865705% 720 .2648745923% 721 .2670559991% 722 .2692303413% 723 .2713971677% 724 .2735560258% 725 .2757064617% 726 .2778480207% 727 .2799802469% 728 .2821026836% 729 .2842148736% 730 .2863163592% 731 .2884066823% 732 .2904853847% 733 .2925520083% 734 .294606095% 735 .2966471872% 736 .2986748276% 737 .3006885598% 738 .3026879281% 739 .3046724778% 740 .3066417555% 741 .3085953089% 742 .3105326875% 743 .3124534422% 744 .3143571259% 745 .3162432935% 746 .318111502% 747 .319961311% 748 .3217922822% 749 .3236039804% 750 .3253959731% 751 .3271678308% 752 .3289191272% 753 .3306494394% 754 .332358348% 755 .3340454374% 756 .3357102958% 757 .3373525153% 758 .3389716924% 759 .3405674278% 760 .3421393268% 761 .3436869994% 762 .3452100603% 763 .3467081292% 764 .3481808311% 765 .3496277963% 766 .3510486603% 767 .3524430643% 768 .3538106555% 769 .3551510867% 770 .3564640167% 771 .3577491108% 772 .3590060404% 773 .3602344833% 774 .361434124% 775 .3626046537% 776 .3637457705% 777 .3648571794% 778 .3659385925% 779 .3669897292% 780 .3680103162% 781 .3690000876% 782 .3699587853% 783 .3708861587% 784 .371781965% 785 .3726459693% 786 .3734779448% 787 .3742776726% 788 .3750449422% 789 .3757795513%

mathtime

790 .3764813059% 791 .3771500206% 792 .3777855183% 793 .3783876308% 794 .3789561983% 795 .3794910699% 796 .3799921035% 797 .3804591659% 798 .3808921328% 799 .3812908888% 800 .3816553278% 801 .3819853524% 802 .3822808747% 803 .3825418158% 804 .382768106% 805 .3829596847% 806 .3831165009% 807 .3832385125% 808 .383325687% 809 .383378001% 810 .3833954406% 811 .383378001% 812 .383325687% 813 .3832385125% 814 .3831165009% 815 .3829596847% 816 .382768106% 817 .3825418158% 818 .3822808747% 819 .3819853524% 820 .3816553278% 821 .3812908888% 822 .3808921328% 823 .3804591659% 824 .3799921035% 825 .3794910699% 826 .3789561983% 827 .3783876308% 828 .3777855183% 829 .3771500206% 830 .3764813059% 831 .3757795513% 832 .3750449422% 833 .3742776726% 834 .3734779448% 835 .3726459693% 836 .371781965% 837 .3708861587% 838 .3699587853% 839 .3690000876% 840 .3680103162% 841 .3669897292% 842 .3659385925% 843 .3648571794% 844 .3637457705% 845 .3626046537% 846 .361434124% 847 .3602344833% 848 .3590060404% 849 .3577491108% 850 .3564640167% 851 .3551510867% 852 .3538106555% 853 .3524430643% 854 .3510486603% 855 .3496277963% 856 .3481808311% 857 .3467081292% 858 .3452100603% 859 .3436869994% 860 .3421393268% 861 .3405674278% 862 .3389716924% 863 .3373525153% 864 .3357102958% 865 .3340454374% 866 .332358348% 867 .3306494394% 868 .3289191272% 869 .3271678308% 870 .3253959731% 871 .3236039804% 872 .3217922822% 873 .319961311% 874 .318111502% 875 .3162432935% 876 .3143571259% 877 .3124534422% 878 .3105326875% 879 .3085953089% 880 .3066417555% 881 .3046724778% 882 .3026879281% 883 .3006885598% 884 .2986748276% 885 .2966471872% 886 .294606095% 887 .2925520083% 888 .2904853847% 889 .2884066823% 890 .2863163592% 891 .2842148736% 892 .2821026836% 893 .2799802469% 894 .2778480207% 895 .2757064617% 896 .2735560258% 897 .2713971677% 898 .2692303413% 899 .2670559991% 900 .2648745923% 901 .2626865705% 902 .2604923814% 903 .2582924713% 904 .256087284% 905 .2538772616% 906 .2516628437% 907 .2494444674% 908 .2472225676% 909 .2449975762% 910 .2427699224% 911 .2405400325% 912 .2383083297% 913 .236075234% 914 .2338411622% 915 .2316065274% 916 .2293717394% 917 .2271372043% 918 .2249033244% 919 .2226704981% 920 .2204391199% 921 .21820958% 922 .2159822646% 923 .2137575555% 924 .2115358303% 925 .209317462% 926 .2071028189% 927 .2048922648% 928 .2026861589% 929 .2004848552% 930 .1982887031% 931 .1960980469% 932 .1939132261% 933 .1917345747% 934 .1895624218% 935 .1873970911% 936 .1852389011% 937 .1830881649% 938 .1809451901% 939 .1788102791% 940 .1766837286% 941 .1745658295% 942 .1724568676% 943 .1703571226% 944 .1682668688% 945 .1661863747% 946 .164115903% 947 .1620557107% 948 .160006049% 949 .1579671632% 950 .1559392929% 951 .1539226716% 952 .1519175272% 953 .1499240815% 954 .1479425506% 955 .1459731445% 956 .1440160674% 957 .1420715176% 958 .1401396876% 959 .1382207637% 960 .1363149267% 961 .1344223512% 962 .1325432061% 963 .1306776543% 964 .1288258532% 965 .1269879539% 966 .1251641021% 967 .1233544376% 968 .1215590943% 969 .1197782007% 970 .1180118794% 971 .1162602473% 972 .1145234158% 973 .1128014907% 974 .1110945723% 975 .1094027553% 976 .107726129% 977 .1060647772% 978 .1044187785% 979 .102788206% 980 .1011731277% 981 .0995736062% 982 .0979896992% 983 .0964214589% 984 .0948689328% 985 .0933321632% 986 .0918111876% 987 .0903060385% 988 .0888167435% 989 .0873433258% 990 .0858858036% 991 .0844441905% 992 .0830184956% 993 .0816087236% 994 .0802148745% 995 .0788369443% 996 .0774749245% 997 .0761288024% 998 .0747985611% 999 .0734841799% 1000 .0721856337% 1001 .0709028938% 1002 .0696359275% 1003 .0683846984% 1004 .0671491663% 1005 .0659292875% 1006 .0647250147% 1007 .0635362971% 1008 .0623630804% 1009 .0612053073% 1010 .0600629169% 1011 .0589358454% 1012 .0578240257% 1013 .056727388% 1014 .0556458592% 1015 .0545793635% 1016 .0535278225% 1017 .0524911548% 1018 .0514692767% 1019 .0504621015% 1020 .0494695405% 1021 .0484915025% 1022 .0475278937% 1023 .0465786183% 1024 .0456435785% 1025 .044722674% 1026 .0438158028% 1027 .0429228609% 1028 .0420437424% 1029 .0411783396% 1030 .040326543% 1031 .0394882417% 1032 .038663323% 1033 .0378516729% 1034 .0370531757% 1035 .0362677145% 1036 .0354951712% 1037 .0347354264% 1038 .0339883593% 1039 .0332538485% 1040 .0325317711% 1041 .0318220035% 1042 .0311244212% 1043 .0304388988% 1044 .0297653101% 1045 .0291035284% 1046 .028453426% 1047 .027814875% 1048 .0271877467% 1049 .026571912% 1050 .0259672415% 1051 .0253736054% 1052 .0247908734% 1053 .0242189152% 1054 .0236576003% 1055 .0231067979% 1056 .0225663772% 1057 .0220362074% 1058 .0215161576% 1059 .0210060971% 1060 .0205058953% 1061 .0200154215% 1062 .0195345455% 1063 .0190631372% 1064 .0186010667% 1065 .0181482048% 1066 .0177044221% 1067 .0172695901% 1068 .0168435804% 1069 .0164262653% 1070 .0160175176% 1071 .0156172104% 1072 .0152252178% 1073 .0148414142% 1074 .0144656747% 1075 .0140978753% 1076 .0137378924% 1077 .0133856033% 1078 .0130408862% 1079 .0127036199% 1080 .012373684% 1081 .0120509592% 1082 .0117353268% 1083 .0114266692% 1084 .0111248695% 1085 .0108298121% 1086 .010541382% 1087 .0102594653% 1088 .0099839492% 1089 .0097147217% 1090 .0094516722% 1091 .0091946908% 1092 .0089436688% 1093 .0086984986% 1094 .0084590736% 1095 .0082252884% 1096 .0079970387% 1097 .0077742214% 1098 .0075567343% 1099 .0073444766% 1100 .0071373486% 1101 .0069352516% 1102 .0067380883% 1103 .0065457624% 1104 .0063581789% 1105 .0061752439% 1106 .0059968648% 1107 .0058229501% 1108 .0056534096% 1109 .0054881541% 1110 .0053270957% 1111 .005170148% 1112 .0050172252% 1113 .0048682433% 1114 .0047231192% 1115 .004581771% 1116 .004444118% 1117 .0043100809% 1118 .0041795813% 1119 .0040525422% 1120 .0039288877% 1121 .0038085432% 1122 .003691435% 1123 .0035774909% 1124 .0034666398% 1125 .0033588115% 1126 .0032539373% 1127 .0031519495% 1128 .0030527814% 1129 .0029563678% 1130 .0028626442% 1131 .0027715476% 1132 .0026830158% 1133 .0025969879% 1134 .0025134041% 1135 .0024322056% 1136 .0023533346% 1137 .0022767346% 1138 .00220235% 1139 .0021301262% 1140 .0020600098% 1141 .0019919482% 1142 .0019258901% 1143 .0018617851% 1144 .0017995835% 1145 .001739237% 1146 .0016806981% 1147 .0016239203% 1148 .0015688579% 1149 .0015154663% 1150 .0014637018% 1151 .0014135215% 1152 .0013648836% 1153 .001317747% 1154 .0012720715% 1155 .001227818% 1156 .0011849479% 1157 .0011434238% 1158 .0011032087% 1159 .0010642668% 1160 .001026563% 1161 .0009900629% 1162 .000954733% 1163 .0009205404% 1164 .0008874531% 1165 .0008554398% 1166 .00082447% 1167 .0007945139% 1168 .0007655422% 1169 .0007375265% 1170 .0007104392% 1171 .000684253% 1172 .0006589417% 1173 .0006344793% 1174 .0006108408% 1175 .0005880017% 1176 .000565938% 1177 .0005446265% 1178 .0005240444% 1179 .0005041696% 1180 .0004849806% 1181 .0004664564% 1182 .0004485764% 1183 .0004313208% 1184 .0004146702% 1185 .0003986057% 1186 .0003831089% 1187 .0003681619% 1188 .0003537473% 1189 .0003398483% 1190 .0003264482% 1191 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mathtime

本来想暴力计算得出精确值,但计算时间不容许计算精度也不允许。 只好采用近似计算，所以和为20等的概率（1/80^20）表示不出只好写0

mathtime

D:\fhm\studio\算概率分布\20个80概率分布.bmp

mathtime

请问如何输入图片？我想放分布图

mathtime

他们的和值范围在210至809的概率为 49.8083022762% 他们的和值范围在811至1410的概率为 49.8083022762% 两者概率相等。 另外不能插入图片，整个和值的概率分布有点象正态分布，挺好看。

醉月听花

他们的和值范围在210至809的概率为 49.8083022762% 他们的和值范围在811至1410的概率为 49.8083022762% 两者概率相等。 另外不能插入图片，整个和值的概率分布有点象正态分布，挺好看。 mathtime 发表于 2013-3-19 09:58

添加附件就可以插入图片了，谢谢啦

mathtime

报"图片格式错", 图片小于500K