If there are 28 relation from a set A = {2,4, 6, 8} to a set B, then t – InterviewSolution

1.

If there are 28 relation from a set A = {2,4, 6, 8} to a set B, then the number of elements in B is …(1) 7(2) 14(3) 5(4) 4

Answer»

(1) 7

n(A) = 4

n(A x B) = 28

n(A) x n(B) = 28

4 x n(B) = 28

n(B) = 28/4 = 7

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