JEE Main Mathematics question

Mathematics Permutations and Combinations JEE Main

The number of ways in which different pearls of two colours can be set alternately on a necklace, there being pearls of each colour, is

(A)
(B)Correct
(C)
(D)None of these

Answer: (B)

Solution

Place the pearls of the first colour round the necklace in ways, which leaves alternate places for the other colour. The pearls of the

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Question ID VK-020818