In a class of 150 students, 40% of the students got 45 marks on average and 46 % of the students got 60 marks on average. the average marks for the total class are 55.find the average marks secured by rest of the students.
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The rest students will get the average no. 67
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Average of marks of remaining students is 67.14
1) Total number of students in class = 150
2) Number of students in group 1 = 40% = 60 students
Average marks scored by group 1 = 45
Sum of total marks of group 1 = 60*45 = 2700
3) Number of students in group 2 = 46% = 69 students
Average marks scored by group 2 = 60
Sum of total marks of group 2 = 60*69= 4140
4) Remaining students = 150-60-69 = 21 students
Average of complete class = 55
Sum of marks of complete class = 55*150 =8250
marks scored by group 3 = 8250-2700-4140 =1410
5) Average of group 3 = 1410 / 21 = 67.14
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