Question

The sum of five numbers A, B, C, D and E is 37.5. The average of A and B is 6, and the average of D and E is 9. The average of A, B and C is:

• A. 7.5
• B. 6
• C. 6.5
• D. 5.5

Answer 1

Answer:

C. 6.5

(A + B + C + D + E) = 37.5 (A + B) ÷ 2 = 6 = A + B = 12 (D + E) ÷ 2 = 9 = D + E = 18 (12 + C + 18) = 37.5 C = 7.5 Average of A,B and C = (12 + 7.5)/ 3 = 6.5