Multiple choice

The average weight of 12 persons increases by 3.5 kg when a new person comes in place of one of them weighing 43 kg. What is the weight of the new person?

  1. 70 kg

  2. 85 kg

  3. 68 kg

  4. 46.5 kg

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

When a new person replaces someone in a group, the total weight changes by the difference between their weights. The average increase of 3.5 kg for 12 persons means total increase = 3.5 × 12 = 42 kg. New person's weight = 43 kg (old person) + 42 kg = 85 kg. Option B (85 kg) is correct.