Question 207496
An automobile license plate consists of 3 letters followed by 4 digits.

How many different plates can be made?
If repetitions are allowed?-----26^3*10^4  
If repetitions are not allowed?---26*25*24*10*9*8 =  
If repetitions are allowed 
in the letters but not in the digits?---26^3*10*9*8
====================================================================
Cheers,
Stan H.