SOLUTION: How many two-digit numbers can formed if the first digit cannot be 0 and no digit can be repeated?

Question 180933: How many two-digit numbers can formed if the first digit cannot be 0 and no digit can be repeated?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How many two-digit numbers can formed if the first digit cannot be 0 and no digit can be repeated?
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ways to select 1st digit: 9
ways to select 2nd digit: 10
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# of two-digit numbers: 9*10 = 90
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Cheers,
Stan H.
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