the first digit cannot be zero. That leaves
9*9*8*7 = 4536
A 4 digit number is to be selected at random from the numbers 0 to 9 with no repetition of digits. How many arrangements can there be?
I keep getting 5040 by doing 10 x 9 x 8 x 7 but the answers say 4536 ways. I dont know what I am doing wrong.
2 answers
Ahh yes forgot about zero. Thanks heaps