Math, asked by ayshanazar786, 9 months ago

36 boys in a class weight 42kg on average if the teacher is included, the average increase by 1.5 kg how much does the teacher weight

Answers

Answered by LEGEND778

Answer:

97.5 kg.

Step-by-step explanation:

Notice that the 36 boys have a total weight of 42*36 kg (by just multiplying the average by the number of boys). Then, the 36 boys and the teacher have a total weight of 43.5*37 (the new average is 42 + 1.5 = 43.5 kg and there are now 36 + 1 = 37 people total). Hence, the teacher weighs:

43.5*37 - 42*36 = 97.5 kg.

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