# MATH Prob.

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How many three-symbol codes can be formed from the
letters I, S, P, and Y without repetition?

• MATH Prob. -

What is 4*3*2?

• MATH Prob. -

• MATH Prob. -

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?

• MATH Prob. -

As far as your first question, I think bobpursley is referring to 4! called "four factorial."

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