Arielle wants to choose five players for her basketball team. There are seven players to choose from. How many different teams can Arielle make?
A. 21
B. 32
C. 42
D. 56
We can use the combination formula to solve this problem, which is:
n choose k = n! / (k! * (n-k)!)
where n is the total number of players (7) and k is the number of players we want to choose (5).
Therefore, the number of different teams Arielle can make is:
7 choose 5 = 7! / (5! * (7-5)!) = 7! / (5! * 2!) = (7 * 6 * 5 * 4 * 3) / (5 * 4 * 3 * 2 * 1 * 2) = 21
So the answer is A. 21.