Calculate the less than cumulative frequency of the last group for the given grouped frequency distribution.

Class intervals Frequency

0-10 5

10-20 7

20-30 8

30-40 9

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Solution

The correct option is D 29
The progressive sum of the frequencies from the first class interval to a particular class interval is the less than cumulative frequency.

$5$
$5 + 7 = 12$
$12 + 8 = 20$
$20 + 9 = 29$

We add successive frequencies of all the x values.

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Similar questions

Marks Obtained	Less than 5	Less than 10	Less than 15	Less than 20	Less than 25
No. of Students (Cumulative)	4	6	10	13	17

Class Marks	$10$	$22$	$34$	$46$	$58$	$70$
Frequency	$6$	$14$	$20$	$21$	$9$	$5$

Mark	Cumulative Frequency
Less than 5 Less than 15 Less than 25 Less than 35 Less than 45 Less than 55 Less than 65 Less than 75	0 3 5 15 44 70 91 106

\begin{matrix} Marks & Cumulative frequency Less than 10 & 5 Less than 20 & 16 Less than 30 & 35 Less than 40 & K Less than 50 & 80 \end{matrix}

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