Average score of a class of 60 students in an exam…

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Average score of a class of 60 students, in an exam, was 43. Average score of the students who had passed is 52 and the average score of students who had failed is 16. How many failed the exam?

1. A. 25
2. B. 20
3. C. 15
4. D. 18

Answer: Option C

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