SOLUTION: how many different id cards can be made if there are four digits on a card and no digit can be used more than once
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Question 1148640: how many different id cards can be made if there are four digits on a card and no digit can be used more than once Found 2 solutions by ikleyn, Alan3354:Answer by ikleyn(52781) (Show Source):
You can put this solution on YOUR website! how many different id cards can be made if there are four digits on a card and no digit can be used more than once
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If leading zeroes are accepted, eg, 0123, it's
10*9*8*7
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If not, it's 9*9*8*7
