How many different 7 digit phone numbers are possible if number can be repeated, but the last number must be 0 ?

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08-01-2019
Mathematics

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How many different 7 digit phone numbers are possible if number can be repeated, but the last number must be 0 ?

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offguard offguard · Answer 1 · 2019-01-08T02:43:00+01:00

offguard offguard

08-01-2019

Since the last digit is already decided, you only have to find the possible ways for a 6 digit phone number. For each individual digit, you have a possibility of 10. Since there are 10 numbers, the answer is [tex]10^6=1000000[/tex]

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