你说这些四月分同学两人同日生的可能性有多大?
回复:我们班四月出生的特别多,占1/5。全班35人,
觉得应该比这个数字要大,大很多。
0.27,B is so,so.In fact,I can't do fast as young man
Please read my answer ,chang 5 to 7,ha ,too careless
Sorry ,It shout be 0.3, I for get *30
wrong
29.6266667%
53.1%
夏天精子較為活躍
P(30,6)*C(7,2)/30^7=0.410511111,I use 5 people carelessly.
agree~~~
3,4%
70%
0.65
回复:0.65
严格求解: 0.4833716386560448
回复:严格求解: 0.4833716386560448
回复:回复:严格求解: 0.4833716386560448
You are right! I am a mathmatician and statistician
简单了点。
2986/5625 (~0.5308)
因为你们的父母在6月时春情涌动!
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,