The marks scored by 40 students of class VIII in mathematics are given below:
81, 55, 68, 79, 85, 43, 29, 68, 54, 73, 47, 35, 72, 64, 95, 44, 50, 77, 64, 35, 79, 52, 45, 54, 70, 83, 62, 64, 72, 92, 84, 76, 63, 43, 54, 38, 73, 68, 52, 54.
Prepare a frequency distribution with class size of 10 marks.

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Solution

The frequency table of the marks scored by 40 students of class VIII in mathematics is given below:

Mark Tally Marks Frequency

20 $-$ 30 | 1

30 $-$ 40 ||| 3

40 $-$ 50 |||| 5

50 $-$ 60 |||| ||| 8

60 $-$ 70 |||| ||| 8

70 $-$ 80 |||| |||| 9

80 $-$ 90 |||| 4

90 $-$ 100 || 2

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Q. The marks obtained by 40 students of a class in an examination are given below.
3,20,13,1,21,13,3,23,16,13,18,12,5,12,5,24,9,2,7,18,20,3,10,12,7,18,2,5,7,10,16,8,16,17,8,23,24,6,23, 15.
Present the data in the form of a frequency distribution using equal class size, one such class being 10−15 (15 not included).

Q. The marks obtained by 40 students of a class in an examination are given below:
8, 47, 22, 31, 17, 13, 38, 26, 3, 34, 29, 11, 22, 7, 15, 24, 38, 31, 21, 35, 42, 24, 45, 23, 21, 27, 29, 49, 25, 48, 21, 15, 18, 27, 19, 45, 14, 34, 37, 34.
Prepare a frequency distribution table with equal class intervals, starting from 0−10 (where 10 not included).

Q. The marks of

24

candidates in the subject mathematics are given below:

45	48	15	23	30	35	40	11
29	0	3	12	48	50	18	30
15	30	11	42	23	2	3	44

The maximum marks are

50.

Make a frequency distribution taking class intervals

0 - 10, 10 - 20, . . . . . . . . . . . . .

Q. Consider the following marks (out of

50

) scored in mathematics by

50

students of

8 t h

class:

41, 31, 33, 32, 28, 31, 21, 10, 30, 22, 33, 37, 12, 05, 08, 15, 39, 26, 41, 46, 34, 22, 09

11, 16, 22, 25, 29, 31, 39, 23, 31, 21, 45, 47, 30, 22, 17, 36, 18, 20, 22, 44, 16, 24, 10, 27, 39, 28, 17

.
Prepare a frequency distribution table

The marks scored by 40 students of class IX in mathematics are given below:
$\begin{matrix} 81, & 55, & 68, & 79, & 85, & 43, & 29, & 68, & 54, & 73, & 47, 35, & 72, & 64, & 95, & 44, & 50, & 77, & 64, & 35, & 79, & 52, 45, & 54, & 70, & 83, & 62, & 64 & 72, & 92, & 84, & 76 & 63 43, & 54, & 38, & 73, & 68, & 52, & 54 \end{matrix}$
Prepare a frequency distribution with class size of 10 marks.

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Mark	Tally Marks	Frequency
20 $-$ 30	\|	1
30 $-$ 40	\|\|\|	3
40 $-$ 50	~~\|\|\|\|~~	5
50 $-$ 60	~~\|\|\|\|~~ \|\|\|	8
60 $-$ 70	~~\|\|\|\|~~ \|\|\|	8
70 $-$ 80	~~\|\|\|\|~~ \|\|\|\|	9
80 $-$ 90	\|\|\|\|	4
90 $-$ 100	\|\|	2

The marks scored by 40 students of class VIII in mathematics are given below: 81, 55, 68, 79, 85, 43, 29, 68, 54, 73, 47, 35, 72, 64, 95, 44, 50, 77, 64, 35, 79, 52, 45, 54, 70, 83, 62, 64, 72, 92, 84, 76, 63, 43, 54, 38, 73, 68, 52, 54. Prepare a frequency distribution with class size of 10 marks.

The frequency table of the marks scored by 40 students of class VIII in mathematics is given below: Mark Tally Marks Frequency 20-30 | 1 30-40 ||| 3 40-50 |||| 5 50-60 |||| ||| 8 60-70 |||| ||| 8 70-80 |||| |||| 9 80-90 |||| 4 90-100 || 2

The marks scored by 40 students of class VIII in mathematics are given below:
81, 55, 68, 79, 85, 43, 29, 68, 54, 73, 47, 35, 72, 64, 95, 44, 50, 77, 64, 35, 79, 52, 45, 54, 70, 83, 62, 64, 72, 92, 84, 76, 63, 43, 54, 38, 73, 68, 52, 54.
Prepare a frequency distribution with class size of 10 marks.

The frequency table of the marks scored by 40 students of class VIII in mathematics is given below:

Mark Tally Marks Frequency

20 $-$ 30 | 1

30 $-$ 40 ||| 3

40 $-$ 50 |||| 5

50 $-$ 60 |||| ||| 8

60 $-$ 70 |||| ||| 8

70 $-$ 80 |||| |||| 9

80 $-$ 90 |||| 4

90 $-$ 100 || 2