Question

letter codes I need a little help here. To start with 4*25*24 (i need four more factors to finish this and I don't know what comes next????

Answer 1

it consist of three letters followed by four digits. how many codes are possible. first letter must be an A, B, C, or D and repetition is not permitted???

Answer 2

so then its 4* 25*24 for the letters

the digits are 10*9*8 as there are the digits 0 1, 2, ... , 9

so combine it for the solution

Answer 3

thanks campbell_st