There are 40 volunteers for the research study on the Power Pill. Each subgroup of the study will contain 10 participants. Determine how many ways these participants can be selected and explain your method.

Question

anonymous · Answer

$$n ^{C}r=\frac{ n! }{ r!(n-r)! }$$

anonymous · Answer

This is the formula that I have to use. I just don't know how to use it. Can anyone explain the process to me. I would really appreciate it. Thanks in advance.

anonymous · Answer

What about you @dtan5457

dtan5457 · Answer

Haven't learned this yet, so I'm learning it right now.

anonymous · Answer

Oh okay, thanks.

dtan5457 · Answer

40! / (10! (40 - 10)!

Apparently, n=total combinations
r=subset of combinations from total

847660528 combinations