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Question

Given n pairs of gloves, the number of ways can each of n persons take a right handed and a left handed glove without taking a pair is

A
n.(n1)2...22.1
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B
n.(n1)3...23.1
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C
n.(n1)4...24.1
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D
n.(n1)...2.1
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Solution

The correct option is D n.(n1)2...22.1
The way he can wear it in right hand n! ways and left hand will be (n1)! ways
=n!.(n1)!
=n(n1)!.(n1)!

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