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
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.
