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Let X be a set containing n elements. Tw...

Let X be a set containing n elements. Two subsets A and B of X are chosen at random, the probability that `AuuB=X` is

A

`""^(2n) C _(n ) // 2 ^( 2n )`

B

`""^( 1//2n ) C _(n)`

C

`1.3.5...(2n -1) 2 ^(n) . n !`

D

`(3//4) ^(n)`

Text Solution

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The correct Answer is:
D
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