Following table gives marks and number of students of a class- Marks No- Of students 0-10 2 10-20 12 20-30 19 30-40 28 40-50 21 Which point on the frequency polygon will have its y coordinate as 19 -

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Question

Following table gives marks and number of students of a class.

Which point on the frequency polygon will have its y coordinate as 19?

(35,19)

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(25,19)

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(30,19)

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(20,19)

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Solution

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A frequency polygon is drawn for the following data. So the x-coordinate of the point having y coordinate as 21 is

X

Marks	0−10	10−20	20−30	30−40	40−50	50−60
Frequency	12	18	27	?	17	6

Marks	10−20	20−30	30−40	40−50	50−60
No. of students	12	18	14	63	19

Marks (Class interval)	Number of students (Frequency)
1−10	7
11−20	10
21−30	6
31−40	4
41−50	3

Marks	0−10	10−20	20−30	30−40	40−50
Number of Students	8	30	40	12	10

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