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CBSE Class 11-commerce Answered

Q.7 The following table gives the marks obtained by 10 students of a class. (3)
S.No. 1 2 3 4 5 6 7 8 9 10
Marks 43 60 37 48 65 48 57 78 31 59
Find out mean marks, using Direct method as well as short-cut method.
Asked by sntshtrk530 | 04 Sep, 2017, 04:36: AM
answered-by-expert Expert Answer
 

Students

Marks(x)

d = X - A

1

43

-22

2

60

-5

3

37

-28

4

48

-17

5

65 = A

0

6

48

-17

7

57

-8

8

78

13

9

31

-34

10

59

-6

 

∑X = 526

∑d = -124

 
 
Now apply the formula to arrive arithmetic mean.
 
 
 
 
 
 
Answered by Tharageswari S | 04 Sep, 2017, 12:50: PM
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