Determine the Average Mark of the Class in that Subject
In a classroom, there are 40 students, in a subject, 10 student, have scored 55 marks, 20 students have 60 marks and the remaining 10 students have a cored 65 marks. What is the average of the class in that subject?
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Total marks by 10 students= 10*55=550
Total marks by 20 students= 20*60=1200
Total marks by remaining 10 students= 10*65= 650
Total marks scored by all 40 students= 550+1200+650= 2400
Average marks of the class= 2400/40= 60
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