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Select 4 people from 3 boys and 3 girls. What is the probability of two boys and two girls being selected?
Select 4 people from 3 boys and 3 girls. What is the probability of two boys and two girls being selected?
admin
2021-10-21
118
问题
Select 4 people from 3 boys and 3 girls. What is the probability of two boys and two girls being selected?
选项
A、3/15
B、4/9
C、3/5
D、2/3
E、1/3
答案
C
解析
从3男3女中选取4人,一共有C
6
4
=15种取法。选2男2女的选法是,从3个男的中选择2个,再从3个女的中选择2个,共9种取法,所以所求概率是9/15=3/5。
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