1.

Let X = {1, 2, 3, 4, 5}. The number of different ordered pairs (Y, Z) that can formed such that Y⊆X, Z⊆X and Y∩Z is empty is:

Answer»

Let X = {1, 2, 3, 4, 5}. The number of different ordered pairs (Y, Z) that can formed such that YX, ZX and YZ is empty is:



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