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Out of 100 students of the class 20 scored an average of 40 marks, 30 scored an average of 50 marks, 50% of the remaining scored an average of 60 marks and the rest scored 100 marks. Find the average marks scored by the students.

Out of 100 students of the class 20 scored an average of 40 marks, 30 scored an average of 50 marks, 50% of the remaining scored an average of 60 marks and the rest scored 100 marks. Find the average marks scored by the students. Correct Answer 57

Total marks obtained: 20 * 40 = 800 30 * 40 = 1200 50% of the remaining = 50 * 50 / 100 = 25 20 * 60 = 1200 Remaining = 25. 25 * 100 = 2500 Total marks obtained = 800 + 1200 + 1200 + 2500 = 5700 Average marks = 5700 / 100 = 57

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