Question 34932
For some civil cases, at least 9 of 12 jurors must agree on a verdict.  How many combinations of 9 jurors ar possible froma 12-person jury?

You are counting "groups" of people.  Order does not make a difference
in the group.

You want "number of comginations of 12 objects taken 9 at a time".

12C9= [12!]/[(12-9)!*9!] = [12*11*10]/[1*2*3]
= 220 ways

Cheers,
Stan H.