Combinations-different way to form groups of people

[Stat_Newbie]

Hello everyone,

I am new to this forum. Need help with this problem

How many ways you can select 3-person groups from a group of 8 students?

My solution:
----------------
Number of ways to make one group of 3 persons = 8C3
How do I proceed from here?

Thank you.

 

[th4450]

Apply the formula nCr = $\frac{n!}{(n-r)! r!}$
or just simply use a calculator