Question

The average of 25 numbers is 15 and the average of first five numbers is 35. What is the average of remaining numbers?

• A. 10
• B. 14
• C. 12
• D. 13

Answer 1

Answer:

A. 10

Let the average of remaining numbers be x, then Sum of 25 numbers = Sum of first 5 numbers + Sum of remaining 20 numbers ⇒ (25 × 15) = (5 × 35) + 20x ⇒ 375 = 175 + 20x ⇒ 20x = 375 - 175 ⇒ 20x = 200 ⇒ x = 10