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A is a set containing n elements, A subs...

A is a set containing n elements, A subset P (may be void also) is selected at random from set A and the set A is then reconstructed by replacing the elements of P. A subset Q (may be void also) of A is again chosen at random. The probability that

A

`(""^(2n) C_(n))/(2^(2n))`

B

`(1)/(""^(2n) C_(n))`

C

`(1 . 3 . 5…. (2n -1))/(2^(n)., n!)`

D

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

Text Solution

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The correct Answer is:
A, C
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