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A singing choir of 4 children is to be formed. The selection pool consists of 8 siblings pairs. In how many ways can a

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A singing choir of 4 children is to be formed. The selection pool consists of 8 siblings pairs. In how many ways can a

by M7MBA » Tue Nov 10, 2020 6:55 am

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A singing choir of 4 children is to be formed. The selection pool consists of 8 siblings pairs. In how many ways can a choir be formed if both siblings cannot be selected together?

(A) 360
(B) 720
(C) 1120
(D) 2400
(E) 26880

Answer: C

Source: e-GMAT
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