Question

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
$10-20$	$1$
$20-30$	$3$
$30-40$	$5$
$40-50$	$9$
$50-60$	$7$
$60-70$	$3$

Answer 1

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.