Multiple choice

The average weight of 5 men is decreased by 3 kg when one of them weighing 150 kg is replaced by another person. Find the weight of the new person?

  1. 165 kg.

  2. 138 kg.

  3. 135 kg.

  4. 162 kg.

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When one person weighing 150 kg is replaced, the average decreases by 3 kg for 5 men, meaning total weight decreases by 5 × 3 = 15 kg. Therefore, the new person weighs 150 - 15 = 135 kg. Option A (165 kg) would increase the average, not decrease it. Option B (138 kg) and D (162 kg) don't match the calculated 15 kg decrease.