Multiple choice

The average weight of 48 students of a class is 36 kg. If the weights of teacher and principal are included, then thee average becomes 36.76 kg. Find the sum of the weights of teacher and principal?

  1. 108 kg

  2. 105 kg

  3. 112 kg

  4. 110 kg

  5. 114 kg
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D Correct answer
Explanation

Total weight of 48 students = 48 * 36 = 1728. Total weight of 50 people = 50 * 36.76 = 1838. Sum of teacher and principal = 1838 - 1728 = 110 kg.

AI explanation

The total weight of the 48 students is 48 times 36 kg, which equals 1728 kg. The total weight of all 50 people is 50 times 36.76 kg, which equals 1838 kg. The sum of the weights of the teacher and principal is the difference between these totals, so 1838 kg minus 1728 kg equals 110 kg.

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