Solve the problem.
-How many 5-digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, if repetitions of digits are allowed?
A)3125
B)120
C)99,999
D)100,000

Question

Quizplus · Accepted Answer

A 5-digit number can be formed by choosing each digit from 0 to 9. The first digit cannot be 0 (to ensure it's a 5-digit number), so there are 9 choices for the first digit and 10 choices for each of the remaining four digits. Thus, the total number of 5-digit numbers is 9 * 10^4 = 90,000.

Solve the Problem. -How Many 5-Digit Numbers Can Be Formed Using the Digits