The average weight of 45 students in a class is 52…

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The average weight of 45 students in a class is 52 kg. Five of them whose average weight is 48 kg leave the class and other 5 students whose average weight is 54 kg join the class. What is the new average weight (in kg) of the class?

  1. A. $$52\frac{1}{3}$$
  2. B. $$52\frac{1}{2}$$
  3. C. $$52\frac{2}{3}$$
  4. D. None of these

Answer: Option C

Here is complete explanation of The average weight of 45 students in a class is 52….

Solution(By ExamCraze Team)

Sum of the weights of the students after replacement
= [(52 × 45) - (48 × 5) + (54 × 5)] kg
= 2370 kg
∴ New average
= $$left( {frac{{2370}}{{45}}} right)$$ kg
= $$52frac{2}{3}$$ kg

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