Question

x + y = 28, y + z = 22, z + x = 34, find the average of x, y and z.

• A. 30
• B. 16
• C. 20
• D. 14

Answer 1

Answer:

D. 14

x + y + y + z + z + x = 28 + 22 + 34 ⇒ 2 (x + y + z) = 84 ⇒ (x + y + z) = 42 The average of x, y and z=42/3=14