Asked by Darrin

How many different four digit numbers can be made from the digits 1 through 7 if no digit is repeated
Answered by bobpursley
7!/4!3!
Answered by Steve
Hmmm. Is it not 7P4 = 7!/3! ?
Answered by Reiny
number of such numbers
= 7x6x5x4
= 7!/3!
= P(7,3)
= 210 , as Steve stated
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