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Finding Mean for Grouped Data When Class Intervals Are Not Given

Arithmetic me...

Question

Arithmetic mean for the given data is
Marks No. of students
0-10 5
10-20 10
20-30 25
30-40 30
40-50 20
50-60 10

A

34

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B

35

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C

33

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D

38

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Solution

The correct option is C $33$
Mid-values No. of students Product
5 5 25
15 10 150
25 25 625
35 30 1050
45 20 900
55 10 550
100 3300
$∴$ Arithmetic Mean $= \frac{3300}{100} = 33$

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Similar questions

The marks obtained by 200 students are given below :

Marks	No of students
0-10	5
10-20	10
20-30	11
30-40	20
40-50	27
50-60	38
60-70	40
70-80	09
80-90	14
90-100	6

Q. There are following the weights of

30

students of class

10

of a secondary school:

34, 34, 36, 37, 38, 33, 34, 35, 36, 37, 38, 33, 34, 35, 34, 33

35, 34, 38, 36, 35, 34, 35, 37, 38, 34, 35, 35, 37

Represent the above data in the form of a frequency distribution table.

Q. Find the mean deviation about the mean for the following data:

Marks obtained	No. of students
0-10	5
10-20	8
20-30	15
30-40	16
40-50	6

$32^{o}$	$34^{o}$	$36^{o}$	$37^{o}$	$38^{o}$
$34^{o}$	$31^{o}$	$34^{o}$	$37^{o}$	$37^{o}$
$37^{o}$	$35^{o}$	$32^{o}$	$34^{o}$	$38^{o}$
$39^{o}$	$31^{o}$	$36^{o}$	$36^{o}$	$39^{o}$
$34^{o}$	$33^{o}$	$35^{o}$	$34^{o}$	$33^{o}$
$37^{o}$	$33^{o}$	$32^{o}$	$34^{o}$	$38^{o}$

find the Mean Median Mode of the given table by

D E V I A T I O N

METHOD with Each step for Mean Median Mode.

Q. Find arithmetic mean of following data:

38, 70, 48, 34, 42, 55, 63, 46, 54, 44

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Finding Mean for Grouped Data When Class Intervals Are Not Given

Standard X Mathematics

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