[求助]滔滔math27-2，概率题

qqy666 · 发表于 2006-8-4 10:19:00

From a group of 3 boys and 3 girls, 4 children are to be randomly selected. What is the probability that equal numbers of boys and girls will be selected?

A. 1/10

B. 4/9

C. 1/2

D. 3/5

E. 2/3

这道题短路了，请教一下思路。

Answer: d

hitlzc · 发表于 2006-8-4 10:53:00

涛涛 27-2 —— GIGI版 5-5
http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=184062&page=1

hitlzc · 发表于 2006-8-4 10:53:00

http://forum.chasedream.com/dispbbs.asp?BoardID=22&replyID=1351522&id=145884&skin=0

hitlzc · 发表于 2006-8-4 10:54:00

http://forum.chasedream.com/dispbbs.asp?BoardID=22&replyID=794694&id=88133&skin=0

qqy666 · 发表于 2006-8-4 12:24:00

谢谢版主，以前还没发现这个讨论汇总。

[求助]滔滔math27-2，概率题

[求助]滔滔math27-2，概率题

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