In a pre school the average weight of 30 girls in…

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In a pre 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. A. 15.2 kg
  2. B. 15.8 kg
  3. C. 15.4 kg
  4. D. 15.6 kg

Answer: Option B

Here is complete explanation of In a pre school the average weight of 30 girls in….

Solution(By ExamCraze Team)

According to the question,
Average = $$frac{30 × 16 + 20 × 15.5}{50}$$
= $$frac{480 + 310}{50}$$
= $$frac{790}{50}$$
= 15.8 kg

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