Questions
A group of 2n students consisting of n boys and n girls are to be arranged in a row such that adjacent members are of opposite sex. The number of ways in which this can be done is
detailed solution
Correct option is C
. There are following ways for the photograph.M1W1M2W2…MnWnor W1M1W2M2…WnMnThis can be done in (2) (n!) (n!) = 2(n!)2 way.Similar Questions
The number of ways in which we can get at least 6 successive tails when a coin is tossed 10 times in a row, is
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