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If n(B)=2 and the number of functions fr...

If `n(B)=2` and the number of functions from A and B which are onto is 30, then number of elements in A is (A) 4 (B) 5 (C) 6 (D) none of these

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If n(A) = 4 and n(B) =6 , then minimum number of elements in A cup B is :

The number of different possible orders of matrices having 12 identical elements is: (A) 3 (B) 1 (C) 6 (D) none of these

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