We need to create three-digit code numbers that must begin with a 7. How many such codes can be made?
A) 700
B) 107
C) 100
D) 27

Question

Quizplus · Accepted Answer

There are 10 possible digits (0-9) for each of the three digits in the code number. Since the first digit must be 7, there is only 1 choice for the first digit. For the two remaining digits, there are 10 choices for each. Therefore, the total number of possible code numbers is 1 x 10 x 10 = 100.

We Need to Create Three-Digit Code Numbers That Must Begin