- 论坛徽章:
- 0
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另外楼主的题要求的概率随着人数x结果大致这样:
x=1, prob=0.000000
x=2, prob=0.002740
x=3, prob=0.008204
x=4, prob=0.016356
x=5, prob=0.027136
x=6, prob=0.040462
x=7, prob=0.056236
x=8, prob=0.074335
x=9, prob=0.094624
x=10, prob=0.116948
x=11, prob=0.141141
x=12, prob=0.167025
x=13, prob=0.194410
x=14, prob=0.223103
x=15, prob=0.252901
x=16, prob=0.283604
x=17, prob=0.315008
x=18, prob=0.346911
x=19, prob=0.379119
x=20, prob=0.411438
x=21, prob=0.443688
x=22, prob=0.475695
x=23, prob=0.507297
x=24, prob=0.538344
x=25, prob=0.568700
x=26, prob=0.598241
x=27, prob=0.626859
x=28, prob=0.654461
x=29, prob=0.680969
x=30, prob=0.706316
x=31, prob=0.730455
x=32, prob=0.753348
x=33, prob=0.774972
x=34, prob=0.795317
x=35, prob=0.814383
x=36, prob=0.832182
x=37, prob=0.848734
x=38, prob=0.864068
x=39, prob=0.878220
x=40, prob=0.891232
x=41, prob=0.903152
x=42, prob=0.914030
x=43, prob=0.923923
x=44, prob=0.932885
x=45, prob=0.940976
x=46, prob=0.948253
x=47, prob=0.954774
x=48, prob=0.960598
x=49, prob=0.965780
x=50, prob=0.970374
x=51, prob=0.974432
x=52, prob=0.978005
x=53, prob=0.981138
x=54, prob=0.983877
x=55, prob=0.986262
x=56, prob=0.988332
x=57, prob=0.990122
x=58, prob=0.991665
x=59, prob=0.992989
x=60, prob=0.994123
x=61, prob=0.995089
x=62, prob=0.995910
x=63, prob=0.996604
x=64, prob=0.997190
x=65, prob=0.997683
x=66, prob=0.998096
x=67, prob=0.998440
x=68, prob=0.998726
x=69, prob=0.998964
x=70, prob=0.999160
x=71, prob=0.999321
x=72, prob=0.999453
x=73, prob=0.999561
x=74, prob=0.999649
x=75, prob=0.999720
x=76, prob=0.999777
x=77, prob=0.999824
x=78, prob=0.999861
x=79, prob=0.999891
x=80, prob=0.999914
x=81, prob=0.999933
x=82, prob=0.999948
x=83, prob=0.999960
x=84, prob=0.999969
x=85, prob=0.999976
x=86, prob=0.999982
x=87, prob=0.999986
x=88, prob=0.999989
x=89, prob=0.999992
x=90, prob=0.999994
x=91, prob=0.999995
x=92, prob=0.999997
x=93, prob=0.999997
x=94, prob=0.999998
x=95, prob=0.999999
x=96, prob=0.999999
x=97, prob=0.999999
x=98, prob=0.999999
x=99, prob=1.000000
x=100, prob=1.000000 |
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