Question

A code is made up of 3 letters (out of {a,b,c,d,e}) and 4 numbers (out of {1,2,3,4,5,6}). How many possible codes are there if repetition is allowed?

Answer 1

there are 5 letters in a,b,c,d,e and 6 numbers in 1,2,3,4,5,6

so the number of possible codes would be

5*5*5*6*6*6*6

make sense?

Answer 2

Yes! Thanks!

Answer 3

welcome