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gre数学题,排列组合题目,求大神解题翻译Inhowmanydifferentwayscan3identicalgreenshirtsand3identicalredshirtsbedistributedamong6childrensuchthateachchildreceivesashirt?

题目详情
gre数学题,排列组合题目,求大神解题翻译
In how many different ways can 3 identical green shirts and 3 identical red shirts
be distributed among 6 children such that each child receives a shirt?
▼优质解答
答案和解析
翻译:有多少种方法可以吧3件同样的红衬衫和3件同样的绿衬衫分给6个小孩,使每个小孩收到一件衬衫
相当于6个小孩取3个收红衬衫
直接是6取3的组合
答案是20