SOLUTION: Please explain how to work these permutaion and combination problems. I don't understand. problem 1: 5 people are in line. How many different outcomes are there? Problem 2:

Algebra ->  Permutations -> SOLUTION: Please explain how to work these permutaion and combination problems. I don't understand. problem 1: 5 people are in line. How many different outcomes are there? Problem 2:       Log On


   

Question 256701: Please explain how to work these permutaion and combination problems. I don't understand.
problem 1: 5 people are in line. How many different outcomes are there?
Problem 2: How many ways can you select a committee of 4 from a group of 10?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
2) nCr=n!/((n-r)!r!) combination of n things taken r at a time.
10C4=%2810%2A9%2A8%2A7%2Across%286%21%29%29%2F%28cross%286%21%29%2A4%21%29
=210 ways