How many three-symbol codes can be formed from the

letters I, S, P, and Y without repetition?

4 answers

What is 4*3*2?
Can you please show me how you got that answer?
How many three-symbol codes (letter-number-number)
can be made from the letters S, P, Y, and two digits
from the set {0, 1, 2,....., 9} without repetition?
As far as your first question, I think bobpursley is referring to 4! called "four factorial."