SOLUTION: Given the digits 4,5,6,7,8,how many 3 digit number can be formed if repetition is 1 Allowed? 2)not allowed?

Algebra ->  Permutations -> SOLUTION: Given the digits 4,5,6,7,8,how many 3 digit number can be formed if repetition is 1 Allowed? 2)not allowed?      Log On


   

Question 1088361: Given the digits 4,5,6,7,8,how many 3 digit number can be formed if repetition is 1 Allowed?
2)not allowed?
Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.
1)  5%2A3 = 5*5*5 = 125 3-digit numbers, if repetition is allowed,

    and

2)  5*4*3 = 60 3-digit numbers, if repetition is not allowed.