SOLUTION: account numbers for northern oil company consist of nine digits. if the first digit cannot be a 0, how many account numbers are possible?
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Question 356923: account numbers for northern oil company consist of nine digits. if the first digit cannot be a 0, how many account numbers are possible?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
There are nine ways to select the first digit. For each of those nine ways, there are ten ways to select the second digit. For each of those ninety ways to select the first two digits, there are ten ways to select the third digit, and so on.
Roughly 3 account numbers for every United States citizen.
John
My calculator said it, I believe it, that settles it
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