Question

The marks scored by 40 students of class IX in mathematics are given below:
81, 56, 68, 79, 85, 13, 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.

Answer 1

Prepared a frequency distribution with class size of 10 marks.

Step-by-step explanation:

The marks scored by 40 students of class IX in mathematics are given below:

81, 56, 68, 79, 85, 13, 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.

Class                Frequency

10 - 20              1                    13

20 - 30             1                    29

30 - 40             3                   35 , 35 , 38

40 - 50             4                   47 , 44 , 45 , 43

50 - 60             8                   56 , 54 , 50 , 52 , 54 , 54 , 52 , 54

60 - 70              8                   68 , 68 , 64 , 64 , 62 , 64 , 63 , 68

70 - 80              9                   79 , 73 , 72 , 77 , 79 , 70 , 72 , 76 , 73

80 - 90              4                   81 , 85 , 83 , 84

90 - 100             2                   95 , 92

Learn more:

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Answer 2

$\huge\star\mathfrak\blue{{Answer:-}}$

The marks scored by 40 students of class IX in mathematics are given below:

81, 56, 68, 79, 85, 13, 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.

Class Frequency

10 - 20 1 13

20 - 30 1 29

30 - 40 3 35 , 35 , 38

40 - 50 4 47 , 44 , 45 , 43

50 - 60 8 56 , 54 , 50 , 52 , 54 , 54 , 52 , 54

60 - 70 8 68 , 68 , 64 , 64 , 62 , 64 , 63 , 68

70 - 80 9 79 , 73 , 72 , 77 , 79 , 70 , 72 , 76 , 73

80 - 90 4 81 , 85 , 83 , 84

90 - 100 2 95 , 92