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A school has 4 sections of chemistry in Class X having 40, 35, 45 and 42 students. The mean marks obtained in Chemistry test are 50, 60, 55 and 45 respectively for the 4 sections. Determine the overall average of marks per student.
- A. 50.25
- B. 51.25
- C. 52.25
- D. 53.25
Answer: Option C
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