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  9. Q57

SSC GD Constable 2012 · Question 57 of 95

In a prep school, the average weight of 30 girls in a class among 50 students is 16 kg and that of the remaining students is 15.5 kg. What is the average weight of all the students in the class ?

  1. A15.2 kg
  2. B15.8 kgCorrect
  3. C15.4 kg
  4. D15.6 kg

Answer: B. 15.8 kg

Explanation

Average weight of 30 girls = 16 kg => Total weight of 30 girls = 16 × 30 = 480 kg Similarly, total weight of remaining (50 − 30 = 20) boys = 15.5 × 20 = 310 kg (480+310) ∴ Average weight of all the students in the class = 50 79 = 5 = 15.8 kg => Ans - (B)

Source: Solved SSC GD 2012 Shift 1 Paper with Solutions — Testbook · reliable-secondary

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