In a group of 8 friends, how many different committees of 3 friends can be formed?
Correct: D
The number of ways to choose 3 friends out of 8 to form a committee is given by the combination formula C(n, k) = n! / [k!(n-k)!], where n is the total number of items, k is the number of items to choose, and '!' denotes factorial, the product of all positive integers less than or equal to that number. For this problem, n = 8 and k = 3. Thus, C(8, 3) = 8! / [3!(8-3)!] = 8! / (3! * 5!) = (8*7*6) / (3*2*1) = 56.