You choose a head coach and an assistant from a group of 12 applicants. How many different groupings are possible?

I know it is either 24 for a double combination of 12 - or I was thinking for number of possibilities it could be 12x11 = 132? Can anyone help me decide what is right and which I should use. thanks

I'm not sure what you mean by "groupings", but you do have 132 choices of the two position.

You first choose the coach from 12 candidates in 12 ways. From the remaining 11 candidates, you choose the assistant. This gives a total of 12*11=132 choice of the two positions.