The marks scored by 20 students in a test are given below- 54-42-68-56-62-71-78-51-72-53-44-58-47-64-41-57-89-53-84-57 Complete the following frequency table- - Marks in class intervals Tally marks Frequency No-of children- 40-50 - 50-60 - 60-70 - 70-80 - 80-90 - - What is the class interval in which the greatest frequency occurs-

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Grouped Frequency Distribution

The marks sco...

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The marks scored by 20 students in a test are given below: 54,42,68,56,62,71,78,51,72,53,44,58,47,64,41,57,89,53,84,57 Complete the following frequency table:

$\begin{matrix} Marks in class intervals & Tally marks & Frequency (No.of children) 40 - 50 50 - 60 60 - 70 70 - 80 80 - 90 \end{matrix}$

What is the class interval in which the greatest frequency occurs?

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80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70, 10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80, 90,

50, 80, 60, 70, 40, 50, 60, 90, 60, 40, 40, 60

60

Marks:	0−10	10−20	20−30	30−40	40−50	50−60	60−70	70−80	80−90	90−100
Frequency:	3	5	16	12	13	20	5	4	1	1

80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70, 10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80,

90, 50, 80, 60, 70, 40, 50, 60, 90, 60, 40, 40, 60

60

40

50

10

80

Class	$0 - 10$	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$	$60 - 70$	$70 - 80$
Frequency	$2$	$5$	$8$	$16$	$9$	$5$	$3$	$2$

\begin{matrix} S c o r e s & C u m u l a t i v e F r e q u e n c y 0 - 20 & 1 20 - 40 & 12 40 - 60 & 21 60 - 80 & 34 80 - 100 & 50 \end{matrix}

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