Multiple choice

In a club, there are 12 wrestlers. When a wrestler, whose weight is 90 kg, leaves the club, he is replaced by a new wrestler. Then, the average weight of this 12-member club increases by 0.75 kg. What is the weight (in kg) of the new wrestler who joins the club?

  1. 108

  2. 99

  3. 112

  4. 100
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The total weight increase is 12 * 0.75 = 9 kg. The new wrestler's weight is the old wrestler's weight plus the total increase: 90 + 9 = 99 kg.

AI explanation

The total weight increase for the 12 wrestlers is 12 times 0.75, which equals 9 kg. Since the 90 kg wrestler is replaced by the new wrestler, this 9 kg increase must be added to his weight to maintain the total sum. The weight of the new wrestler is 90 plus 9, resulting in 99 kg.

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