Solve the problem.
-Using the numerals 0 through 9, how many 5-digit serial numbers can be made if the first digit must be 0 or 1 and numerals may be repeated?
A) 20,000
B) 13,122
C) 80
D) 100,000

Question

Quizplus · Accepted Answer

For the first digit, there are 2 choices (0 or 1). For each of the remaining four positions, there are 10 choices (0 through 9), allowing repetition. Thus, the total number of serial numbers is 2 * 10 * 10 * 10 * 10 = 20,000.

Solve the Problem. -Using the Numerals 0 Through 9, How Many 5-Digit Serial