Multiple choice

The average weight of $8$ men is increased by $1.5$ kg, when one of the men who weight $65$ kg is replaced by a new man. The weight of the new man is

  1. $70$ kg
  2. $74$ kg
  3. $76$ kg
  4. $77$ kg
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total weight increase = 8 * 1.5 = 12 kg. New man's weight = Old man's weight + 12 = 65 + 12 = 77 kg.

AI explanation

The total weight increase for the group is calculated as 8 men multiplied by the 1.5 kg increase per man, giving a total increase of 12 kg. By the replacement method, the new man must weigh 12 kg more than the 65 kg man he replaces. Therefore, his weight is 65 plus 12, which equals 77 kg. The weight of the new man is 77 kg.

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