Question

समाजशास्त्र के 10 विद्यार्थियों के प्राप्तांक निम्नानुसार दिये गये हैं, इनसे माध्य निकालिए-
Given the marks of 10 students of sociology. Find out mean :
प्राप्तांक
विद्यार्थी संख्या
Obtain Marks
No. of Students
20
1
30
2
40
3
50
4
or A »
45
65
70
7.
18
8
22
9
210
10​

Answer 1

Answer:

Step-by-step explanation:

Obtained marks (x)

No. Of student (F) =sum of all then £f=55

Then frequency f.x = then £fx=1947

Mean =£fx/£f =1947/55=35.4

Answer 2

Answer:

The mean mark obtained by the students in sociology is 38.1.

Step-by-step explanation:

Given:
The number of students: 10

The marks obtained by the students: 20,30,40,50,45,65,70,18,22,21

To find:

The mean=?
Solution: Mean = Sum of marks/Number of students

                          = 20+30+40+50+45+65+70+18+22+21/10

                         =381/10 = 38.1

Thus, the mean mark obtained by the students in sociology is 38.1.