The number of ways in which 9 persons can be divided into three equal groups is

JEE Main Mathematics question

The number of ways in which persons can be divided into three equal groups is

(A)
(B)
(C)
(D)Correct

Answer: (D)

Solution

Divide the persons into three groups of : ways if the groups are distinguishable (for example, named). The groups here are only "equal groups" and have no names, so the three groups can be permuted among

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Question ID VK-020581