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A set A={x(1),x(2),x(3),x(4)} and set B=...

A set `A={x_(1),x_(2),x_(3),x_(4)}` and set `B={y_(1),y_(2),y_(3),y_(4)}` and a mapping is randomly selected out of all `f:A rarr B`. The probability that `f` is many to one is
(A) `(29)/(32)` (B) `(3)/(32)` (C) `(9)/(32)` (D) `(3)/(64)`

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