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How many eight-digit numbers can be formed if the leading digit cannot be zero and the last number cannot be 1 ?
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3 votes
How many eight-digit numbers can be formed if the leading digit cannot be zero and the last number cannot be 1 ?

User Pramod Sivadas
by
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1 Answer

5 votes

Answer:

128 unique numbers

Explanation:

Since only 0 and 1 are to be used, an 8 digit number will have a leading 1. The rest 7 places are free to be either 0 or 1

User Jorge Rivera
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