alleryLet A = {1, 2} and B = {3, 4}. The total number of relations from A to B is:
A2
B8
C16
D4
Answer & Solution
Correct answer: C. 16
A × B has 2 × 2 = 4 elements.
Number of relations = number of subsets of A × B = 2^4 = 16. Each subset of A × B is a distinct relation, including the empty relation.
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