SOLUTION: How many five-letter "words" can be made from the letters A,B,C,D,E,F,G,H,I,J if repletion (a)is allowed or (b) is not allowed?

Algebra ->  Permutations -> SOLUTION: How many five-letter "words" can be made from the letters A,B,C,D,E,F,G,H,I,J if repletion (a)is allowed or (b) is not allowed?      Log On


   

Question 879874: How many five-letter "words" can be made from the letters A,B,C,D,E,F,G,H,I,J if repletion (a)is allowed or (b) is not allowed?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
There are 10 letters available and 5 positions.
a)+N=10%2A10%2A10%2A10%2A10=10%5E5=100000
b) N=10%2A9%2A8%2A7%2A6=30240