Permutations and Combinations Question & Answers
A Group consists of 4 couples in which each of the 4 persons have one wife each. In how many ways could they be arranged in a straight line such that the men and women occupy alternate positions?
|A) 1152||B) 1278|
|C) 1296||D) None of these|
Case I : MW MW MW MW
Case II: WM WM WM WM
Let us arrange 4 men in 4! ways, then we arrange 4 women in ways at 4 places either left of the men or right of the men. Hence required number of arrangements
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