Draw a cumulative frequency curve for the following frequency distribution.

Class Interval 0−9 10−19 20−29 30−39 40−49 50−59 60−69

Frequency 5 15 20 23 17 11 9

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Solution

Class Marks Frequency Cumulative Frequency

4.5 5 5

14.5 15 20

24.5 20 40

34.5 23 63

44.5 17 80

54.5 11 91

64.5 9 100

We plot the points A(4.5,5),B(14.5,20),C(24.5,40),D(34.5,63),E(44.5,80),F(54.5,91) and G(64.5,100).

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Similar questions

Draw a histogram to represent the following frequency distribution.

Class Interval	60−69	50−59	40−49	30−39	20−29	10−19
Frequency	13	15	21	20	19	12

Class-intervals	10−29	30−39	40−49	50−59	59−60	60−69
Frequencies	12	19	20	21	15	13

Class interval	1−10	11−20	21−30	31−40	41−50	51−60
Frequency	8	3	6	12	2	7

Class	0-10	10-20	20-30	30-40	40-50	50-60
Frequency	3	9	15	30	18	5

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Class Interval	0−9	10−19	20−29	30−39	40−49	50−59	60−69
Frequency	5	15	20	23	17	11	9