Q5

MCQ1 mark, −0.25

$n$ couples are invited to a party with the condition that every husband should be accompanied by his wife. However, a wife need not be accompanied by her husband. The number of different gatherings possible at the party is

(A)

$^{2n}\mathrm{C}_n\times 2^n$

(B)

$3^n$

(C)

$\frac{(2n)!}{2^n}$

(D)

$^{2n}\mathrm{C}_n$

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