Find the sum of lower limit of the modal class and upper limit of modal class from the following frequency distribution table for the given data:
Class Frequency
$10 - 20$ $1$
$20 - 30$ $3$
$30 - 40$ $5$
$40 - 50$ $9$
$50 - 60$ $7$
$60 - 70$ $3$

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Solution

Highest frequency in this data called modal class
So, here
$9$ is the highest frequency
So, modal class $\Rightarrow 40 - 50$
then,
Sum of lower limit and upper limit of modal class
$\Rightarrow 40 + 50$
$\Rightarrow 90$
Hence, this is the answer.

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Similar questions

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

From the given Frequency distribution table, find the Average Class Mark.

$\begin{matrix} Class Internal & Frequency 0 - 10 & 2 10 - 20 & 8 20 - 30 & 12 30 - 40 & 7 40 - 50 & 9 50 - 60 & 4 60 - 70 & 5 \end{matrix}$

Identify the modal class:

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 Obtained	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$
Cumulative Frequency	$7$	$35$	$27$	$34$

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