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There are 50 students in a class. Their average weight is 45 kg. When one student leaves the class the average weight reduces by 100 g. What is the weight of the student who left the class ?

A. 45 kg. B. 47.9 kg. C. 49.9 kg. D. 50.1 kg. Answer: Option C
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Solution(By Apex Team)

According to the question, The average weight of 50 students was = 45 kg When one student leaves the class the average reduced by 100 gm. ∴ Total weight reduction due to 49 students = 49 × 100 = 4900 gm = 4.9 kg ∴ The weight of student who left = 45 + 4.9 = 49.9 kg

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