Solve the problem.
-Using the numerals 0 through 9, how many 6-digit serial numbers can be made if the first digit must be 0 or 1 and no numerals may be repeated?
A) 8
B) 13,440
C) 30,240
D) 6048

Question

Quizplus · Accepted Answer

The first digit has 2 choices (0 or 1). The remaining 5 digits are chosen from the remaining 9 digits (since no repetition is allowed), so the number of ways is 2 * 9 * 8 * 7 * 6 * 5 = 30,240.

Solve the Problem. -Using the Numerals 0 Through 9, How Many 6-Digit Serial