The mean weight of a class of 36 students is 45 kg. If the weight of the teacher be
included, the mean weight increases by 500 grams. Find the weight of the teacher.
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Answer:
63.5kg
Step-by-step explanation:
Given, The mean weight of a class of 36 students is 45. So,
Total weight of 36 students = 36 × 45 = 1,620
Now, weight of teacher is added. So,
Mean weight of 37 persons = 45kg + 500g = 45kg + 0.5kg = 45.5kg
Total weight of 37 persons(36 students + 1 teacher ) = 37 × 45.5kg = 1,683.5
Thus, Weight of the teacher =
Total weight of 36 Persons - Total weight of 35 students = 1683.5 - 1620 = 63.5kg
Hence, weight of the teacher is 63.5 kg.
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