The average weight of 40 students in a class is 55.25 kg, and that of the remaining 24 students is 52.5 kg. Find the average weight of all the students in the class. (Approximately)a
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Correct answer: C
Explanation
The correct answer is Option 3 i.e. 54.219.
Total weight of first 40 students = 40 × 55.25 = 2210 kg
Total weight of remaining 24 students = 24 × 52.5 = 1260 kg
Combined total weight = 2210 + 1260 = 3470 kg
Overall average = 3470/64 ≈ 54.219 kg