Question

Genuine Bank’s website requires that your pin number only be two numerical digits long. So, the first number to choose is from set A below and the second number to choose is from set B below. Find the cross product A × B to determine the number of possible combinations.

A = {0, 2, 4, 6, 8}

B = {1, 3, 5, 7, 9}

Valliant Bank’s website requires that your pin number be two digits long, the first must be a v or b and the second digit must be a number from 1 to 5. Find the cross product C × D to determine the number of combinations possible.

C = {v, b}