If the average marks of three batches of 55 60 and…

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If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55 and 60, then the average marks of all the students is :

  1. A. 54.68
  2. B. 53.33
  3. C. 55
  4. D. None of these

Answer: Option A

Here is complete explanation of If the average marks of three batches of 55 60 and….

Solution(By ExamCraze Team)

Total marks of three batches
= 55 × 50 + 60 × 55 + 45 × 60
= 2750 + 3300 + 2700
= 8750
Average
$$frac{8750}{55 + 60 + 45}$$
= $$frac{8750}{160}$$
= $$frac{875}{16}$$
= 54.68

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