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The average weight of 25 persons sitting in a boat had some value. A new person added to them whose weight was 46 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 25 persons?

Correct answer: D. None

  • A. 55 kg
  • B. 62 kg
  • C. 56 kg
  • D. None

Explanation

Let the original average be x kg, so the 25-person total is 25x kg. After adding a 46 kg person, the 26-person average is x - 5 kg, giving 25x + 46 = 26(x - 5) and therefore x = 176 kg. Since 176 kg is not listed, option d, None, is appropriate; a likely mistake is choosing 55 kg by treating the 5 kg decrease as the original average.

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