Question

How many 4-digit numbers can be made from the digits 2, 3, 4, 5, 6, 7 if no digit is repeated in the same number?

Answer 1

THis equals the number of permutations of 4 from  6.

= 6P4  =  6! /  (6 - 4)!   = 6! / 2!  =  720/2  = 360 answer