Question

in how many ways we can pick 5 letters out of ARRANGEMENT? (It is a question about permutations and combinations)

Answer 1

Answer:

Since there are no repeating letters, and there are 5 total letters, there are 5!= 120 ways to arrange them. In other words, there are 5 slots to place the first letter in, then 4 slots for the second letter, 3 for the third, 2 for the fourth, and then the last letter goes in the 1 slot that is left.

Answer 2

Answer:

5 letters out

2*5*4*3*5=600 ways.