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JEE MATHEMATICS MCQ: PERMUTATIONS

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Application +4 | -1

There are

(n+1)

white similar balls and

(n+1)

black balls of different size. No. of ways the balls can be arranged in a row so that adjacent balls are of different colours is

View answer and explanation

Correct option: A

2[(n+1) !]^2

Option A (

2[(n+1) !]^2

) is correct because there are two possible arrangements (black first or white first), and each color's balls can be arranged in (n+1)! ways.

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