Asked by Fred
A PIN consists of 6 numbers, with no repetition of any numbers allowed. How many different PINs are possible?
I did 10 x 9 x 8 x 7 x 6 x 5 = 151 200, but the answers say 720. I dont understand why its 6 factirial. Any explanation would be great. Thanks
I did 10 x 9 x 8 x 7 x 6 x 5 = 151 200, but the answers say 720. I dont understand why its 6 factirial. Any explanation would be great. Thanks
Answers
Answered by
Steve
Hmmm. It sounds like they are providing a set of only 6 digits to choose from. In that case, there would indeed be only 6! combinations.
10P6 appears to be the correct answer, however.
10P6 appears to be the correct answer, however.
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