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Let A and B be two sets such that n(A)=6 and n(B)=3. If x denotes the number of onto functions from A to B and y denotes the number of one-one functions from B to A, then the value of x−y is equal to

Answer» Let A and B be two sets such that n(A)=6 and n(B)=3. If x denotes the number of onto functions from A to B and y denotes the number of one-one functions from B to A, then the value of xy is equal to




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