SOLUTION: How many eight​-digit numbers are there if the first three numbers must be 887​, 888​, or 889​?
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Question 1057040: How many eight-digit numbers are there if the first three numbers must be 887, 888, or 889?
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
Since the first 3 digits are defined, you can only vary the last 5 digits. Five digits can make 00000 through 99999, inclusive. This is 100000 patterns. Since only the 3 patterns 887,888, and 889 are allowed for the first 3 digits, there are 3*100000 = 300000 numbers.
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Ans: 300000
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