SOLUTION: a four digit serial number is to be created from the digits 0 through 9. How many of these serial numbers can be created if 0 can not be the first digit, no digit may be repeated,

Question 457537: a four digit serial number is to be created from the digits 0 through 9. How many of these serial numbers can be created if 0 can not be the first digit, no digit may be repeated, and the last digit must be 5? Show work
Answer by amoresroy(361) (Show Source): You can put this solution on YOUR website!
1st digit: 9 posible digits
2nd digit: 9 possible digits
3rd digit: 8 possible digits
4th digit: 1 possible digits (number 5 only)
Number of serial numbers = 9 * 9 * 8 * 1
= 648
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