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