SOLUTION: How many six-digit telephone numbers are possible if the first digit cannot be a (0)

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Question 416956: How many six-digit telephone numbers are possible if the first digit cannot be a (0)
Answer by sudhanshu_kmr(1152) About Me  (Show Source):
You can put this solution on YOUR website!

no. of ways to put digit at first place = 9
no. of ways to put digit at other place = 10

possible numbers = 9 * 10^5 = 900000