Question

New License Plates will have 7 characters, including letters and digits. How many different license plates can Lindsay create if: The first 3 characcter are digits(repeatable), but the last 4 are letters(not repeatable)

Answer 1

So there are 26 letters in the alphabet, right? The numbers that can be used are 0-9 which is 10 numbers. But letters can't be repeated. So basically the equation is

x = 10*10*10*26*25*24*23