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Karl wants to buy a new collar for each of his 2 cats. The collars come...

Karl wants to buy a new collar for each of his 2 cats. The collars come in a choice of 4 different colors.

Step 2 of 2:

How many selections of collars are possible if repetitions of colors are not allowed?

math   Statistics-And-Probability   
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Answer #1

2 collars can be selected from 4 different collars by 4C2 ways.

4C2 = 4! / [ (4-2)! * 2! ]

= 6 ways

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