SOLUTION: how many 3-digit numbers with no repeated digits using 4,5,6,7,8 can be less than 520?

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Question 617264: how many 3-digit numbers with no repeated digits using 4,5,6,7,8 can be less than 520?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
how many 3-digit numbers with no repeated digits using 4,5,6,7,8 can be less than 520?
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1st digit must be a 4
Next 2 digits: 4*3 = 12 ways
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Total #: 1*12 = 12
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Cheers,
Stan H.