2. 外语
  3. 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?

admin2022-11-20  44
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C64=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。
转载请注明原文地址:https://kaotiyun.com/show/s4kO777K
本试题收录于： GRE QUANTITATIVE题库GRE分类
0

GRE QUANTITATIVE

GRE

相关试题推荐
随机试题
最新回复(0)