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我们班四月出生的特别多,占1/5。全班35人,

金属米 2010-04-23 09:47:08 ( reads)

你说这些四月分同学两人同日生的可能性有多大?

跟帖(26)

jinjing

2010-04-23 10:39:53

回复:我们班四月出生的特别多,占1/5。全班35人,

金属米

2010-04-23 10:49:28

觉得应该比这个数字要大,大很多。

jinjing

2010-04-23 13:10:35

0.27,B is so,so.In fact,I can't do fast as young man

jinjing

2010-04-23 13:25:14

Please read my answer ,chang 5 to 7,ha ,too careless

jinjing

2010-04-23 10:58:15

Sorry ,It shout be 0.3, I for get *30

jinjing

2010-04-23 15:20:09

wrong

晓仁悟

2010-05-05 20:02:22

29.6266667%

晓仁悟

2010-05-05 20:28:19

53.1%

吹绉一池春水

2010-08-12 12:57:21

夏天精子較為活躍

twfx

2010-04-23 12:55:08

53.1%

jinjing

2010-04-23 13:22:21

P(30,6)*C(7,2)/30^7=0.410511111,I use 5 people carelessly.

cheerleaders

2010-04-23 17:13:05

agree~~~

PLMM

2010-04-27 18:36:58

3,4%

eyehalfopen

2010-04-27 10:03:54

70%

凤舞64

2010-04-30 12:29:34

0.65

凤舞64

2010-04-30 12:44:57

回复:0.65

qlmj

2010-05-04 20:33:53

回复:我们班四月出生的特别多,占1/5。全班35人,

芷娞

2010-05-07 23:02:43

严格求解: 0.4833716386560448

jinjing

2010-05-08 14:55:07

回复:严格求解: 0.4833716386560448

芷娞

2010-05-08 15:24:36

回复:回复:严格求解: 0.4833716386560448

noname100

2010-05-14 17:00:16

You are right! I am a mathmatician and statistician

玄野

2010-05-19 06:57:33

简单了点。

stone123

2010-05-19 10:40:27

回复:我们班四月出生的特别多,占1/5。全班35人,

dfw

2010-05-25 12:20:09

2986/5625 (~0.5308)

sterking

2010-06-02 21:12:44

因为你们的父母在6月时春情涌动!

sterking

2010-06-02 21:12:55

因为你们的父母在6月时春情涌动!