Question: If the average (arithmetic mean) of the four numbers K, 3K + 3, 3K – 4 and 5K + 1 is 60, what is the value of K?\nOptions:\n(A)  11\n(B)  15 3/4\n(C)  20\n(D)  23\n(E)  25 3/10 Let's think first. Some random reasoning:
User
K + 3K +3 + 3K - 4 + 5K +1 = 12K\n(12K)/4 = 60\n12K = 60 * 4 = 240\nK = 240/ 12 = 20. The final answer: (C).
Assistant