Posted by Rmz on .
How many threesymbol codes (letter, letter, number) can be made from the letters S, P, Y and one digit fro the set {0, 1, 2,...9} without repitition?
What and how do I get started?

math 157 
bobpursley,
What is 3*2*10 ?

math 157 
Rmz,
60