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Let x be set containing 10 elements and ...

Let x be set containing 10 elements and `p(x)` be its power set. If A and B are picked up at random from p(x),with replacement, then probability that A and B have equal number of elements, is

A

`(.^20 C_10)/2^10`

B

`(2^10 -1)/2^20`

C

`(2^10 -1)/2^10`

D

`(.^20 C_10)/2^20`

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The correct Answer is:
A
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