Question

A locker combination consist of 3 digits the digits are numbers 0-9 which is a possible number of combinations?

A. 1,000 combinations
B. 720 combinations
C. 120 combinations
D. 100 combinations

Answer 1

720

Explanation:

If order mattered, we would say select the first number (10 choices), then the second (9 choices) then the third (8 choices). So there would be 10 x 9 x 8 = 720 possible choices.