In a class the average marks got by number of students in English is 52 25 25 students placed in C c...........

Quantitative Aptitude ( CCS) Average

In a class, the average marks got by number of students in English is 52.25. 25% students placed in C category made the average of 31 marks, while 20% who were placed in A category made the average of 80 marks. Find the average marks of the remaining students?

52.2

51.8

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Explanation:

Let there are 100 students in the class, then in category A = 20 students, in C = 25 students, remaining = 55 students. Let x be the average of these 55 students.
So 20*80+ 25*31 + 55*x = 52.25*100
1600 + 775 + 55*x = 5225
55x = 5225-2375
x = 2850/55 = 51.8