Greg has nine paintings. The Hickory Museum has enough space to display three of them.
From how many different sets of three paintings does Greg have to choose?
A . 27
B . 56
C . 84
D . 168
E . 504
Answer: C
Explanation:
Be careful not to count the same set of three paintings more than once C order is not important. A ninechoose-three combination is equal to 
Latest ACT Math Dumps Valid Version with 280 Q&As
Latest And Valid Q&A | Instant Download | Once Fail, Full Refund