SOLUTION: John is getting his ATM card activated. He must select a password with 4 nonzero digits to be able to use his card. How many passwords are allowed if no digit may be used more than

Question 329984: John is getting his ATM card activated. He must select a password with 4 nonzero digits to be able to use his card. How many passwords are allowed if no digit may be used more than once?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
John is getting his ATM card activated. He must select a password with 4 nonzero digits to be able to use his card. How many passwords are allowed if no digit may be used more than once?
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Ans: 9*8*7*6 = 3024
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Cheers,
Stan H.
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