Multiple choice

In a hotel, there are 120 staff members. Their average weight is 62.5kg . When one of the staff members leaves the hotel, the average weight is reduced by 250 g. Find the weight of the staff member who left the hotel.

  1. 64.25 kg

  2. 78.75 kg

  3. 90.50 kg

  4. 92.25 kg
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Original total weight = 120×62.5 = 7500 kg. New average = 62.5-0.25 = 62.25 kg. New total = 119×62.25 = 7407.75 kg. Weight of person who left = 7500-7407.75 = 92.25 kg. Option D is correct. Option A(64.25), B(78.75), and C(90.50) don't match the calculated weight.

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