Multiple choice

Average weight of 20 persons is 60 kg. A new person joins the group and average weight of 21 persons becomes 59 kg. What will be the weight of the new person?

  1. 41 kg

  2. 29 kg

  3. 39 kg

  4. 40 kg

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

Total weight of 20 persons = 20 × 60 = 1200 kg. Total weight of 21 persons = 21 × 59 = 1239 kg. The new person's weight = 1239 - 1200 = 39 kg. Option B (29 kg) and D (40 kg) are incorrect as they don't match the calculated difference.