Question

13. How many different 3-character codes are there using A, B,

or C for the first character, 8 or 9 for the second character,
and 0 or 1 for the third character?

Answer 1

12

Explanation:

___ * ___ * ___

At the first one you have 3 choices so

_3_ * ___ * ___

then you have two choices for the second and third code

so 3 * 2 * 2 = 12