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?

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? Correct Answer 20

6C3 = 6!3!3! = 6.5.4.3!3.2.1.3! = 2.5.2 = 20
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