Question

What is the number of permutations for a 4 digit number using the digits 0 – 9, if numbers cannot be repeated.

Answer 1

Number of permutations for a 4 digit number using the digits 0 – 9 (10 available digits in total), supposing numbers cannot be repeated, is calculated by:

10P4 = 10!/(10-4)! = 5040

Hope this helps!

:)