Posted by Twg on .
How many threesymbol codes can be formed from the
letters I, S, P, and Y without repetition?

MATH Prob. 
bobpursley,
What is 4*3*2?

MATH Prob. 
Twg,
Can you please show me how you got that answer?

MATH Prob. 
Twg,
How many threesymbol codes (letternumbernumber)
can be made from the letters S, P, Y, and two digits
from the set {0, 1, 2,....., 9} without repetition? 
MATH Prob. 
PsyDAG,
As far as your first question, I think bobpursley is referring to 4! called "four factorial."