## anonymous one year ago In how many ways can a teacher arrange 10 students in the front row if there are 60 total students?

Combinations, fun. $\frac{ n! }{ r!(n-r)! }$ Is the equation you want to use.

2. anonymous

can you explain how you get r and n please? thank you

3. butterflydreamer

"n" = set size -> so basically the total number of items in the sample "r" = subset size -> the number of items to be selected from the sample

4. anonymous

$60!/10!(60-10)!$ ? @butterflydreamer

5. butterflydreamer

yepp

6. anonymous

I got 7.41837979E11 is that correct? @butterflydreamer