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Standard X
Mathematics
Direct Method of Finding Mean
Question
Calculate the mean of the following distribution:
Class Interval
0
−
10
10
−
20
20
−
30
30
−
40
40
−
50
50
−
60
Frequency
8
5
12
35
24
16
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Solution
Verified by Toppr
Class
Mid value
(
x
)
f
f
x
0-10
5
8
40
10-20
15
5
75
20-30
25
12
300
30-40
35
35
1225
40-50
45
24
1080
50-60
55
16
880
Total
100
3600
Mean
(
¯
x
)
=
∑
f
x
∑
f
=
3600
100
=
36
.
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Similar Questions
Q1
Calculate the mean of the following distribution:
Class Interval
0
−
10
10
−
20
20
−
30
30
−
40
40
−
50
50
−
60
Frequency
8
5
12
35
24
16
View Solution
Q2
Calculate the mean of the following distribution: [4 MARKS]
C
l
a
s
s
I
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t
e
r
v
a
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F
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e
q
u
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c
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0
−
10
8
10
−
20
5
20
−
30
12
30
−
40
35
40
−
50
24
50
−
60
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View Solution
Q3
Find the mean deviation about the following continuous distribution:
Class interval
0
−
10
10
−
20
20
−
30
30
−
40
40
−
50
50
−
60
60
−
70
70
−
80
Frequency
5
8
7
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28
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View Solution
Q4
Draw a frequency polygon of the following data using histogram.
Class interval
0
−
10
10
−
20
20
−
30
30
−
40
40
−
50
50
−
60
Frequency
5
10
25
16
12
8
View Solution
Q5
Calculate the arithmetic mean of given frequency distribution table.
Class-interval
0
−
10
10
−
20
20
−
30
30
−
40
40
−
50
50
−
60
Frequency
7
14
28
26
16
9
View Solution