Latest Questions UpdateCategory: MathematicsFind mean, marks obtained by 50 students of a class in class 8 of a school in subject mathematics are
Seema Shrimali Staff asked 6 months ago
The marks obtained by 50 students of a class in class 8 of a school in subject mathematics paper consisting of 100 marks are presented in table below.

Find the mean of marks obtained by the students.

Marks Obtained Number of Students
10 1
20 3
36 2
40 3
50 8
60 8
70 5
72 9
80 3
85 4
90 1
93 2
97 1
1 Answers
Education Desk Staff answered 6 months ago
Marks Obtained (x) Number of Students (f) f x
10 1 10
20 3 60
36 2 72
40 3 120
50 8 400
60 8 480
70 5 350
72 9 648
80 3 240
85 4 340
90 1 90
93 2 186
97 1 97
Total : 50 Total : 3093

Now,

Mean is the (sum of all fx) divide by (Total f)  = 3093/60 = 61.86

Therefore, the mean marks obtained by the student is 61.86.