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3/24/2009

Numerical based on arithmetic mean



Numerical based on arithmetic mean
Calculate arithmetic mean of the following series:-
1.)
Wages(Rs.)
10
20
30
40
50
No. of workers:
4
5
3
2
5
(Sol:-29.47)
2.)
Marks:
0-10
10-20
20-30
30-40
40-50
No. of students
20
24
40
36
20
(Sol:-25.85)
3.)
Size:
20-29
30-39
40-49
50-59
60-69
Frequency:
10
8
6
4
2
(Sol:-37.83)
4.)
Marks(less than)
10
20
30
40
50
No. of students:
5
17
31
41
49
(Sol:-25.81)
5.)
Marks(more than)
0
2
4
6
8
No. of students:
30
28
24
18
10
(Sol:-6.33)
6.) marks obtained by 8 students are 15,18,16,45,32,40,30,28 (sol:-28)
7.)
Marks:-
10
20
30
40
50
60
No. of students:
5
2
3
8
4
3
(Sol:-35.2)
8.)
C.I:-
20-25
25-30
30-35
35-40
40-45
45-50
50-55
Frequency:-
10
12
8
20
11
4
5
(Sol:-35.5)
9.)
Marks:-
6-10
11-15
16-20
21-25
26-30
No. of students:
20
30
50
40
10
(Sol:-17.67)
10.)
Marks(less than):-
5
10
15
20
25
30
No. of students:
10
23
30
54
69
80
(Sol:-15.87)
11.)
Bonus(more than)
0
4
8
12
No. of workers:
15
11
3
1
(Sol: - 6)
12.)
X:
-40 to -30
-30 to -20
-20 to -10
-10 to 0
0 to 10
10 to 20
20 to 30
F:
10
28
30
42
65
180
10
(Sol: - 4.287)


Student of Rai Business School- New Delhi

Sanjeev Kumar Singh

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