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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

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The correct Answer is:
`A to P; B to Q ; C to S ; D to S`
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