Find mean, marks obtained by 50 students of a class in class 8 of a school in subject mathematics are

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Seema ShrimaliStaff asked 4 years 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

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Education Desk Staff answered 4 years 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.