If A = {1, 2} and B = {a, b, c, d} then the number of elements in B x A are?
If A = {1, 2} and B = {a, b, c, d} then the number of elements in B x A are?
Explanation
The number of elements in B × A is found by multiplying the number of elements in B and A:
|B| × |A| = 4 × 2 = 8
Each ordered pair has one element from B and one from A.