What is the median class for the following data given below?
Time(min)
$10 - 20$
$20 - 30$
$30 - 40$
$40 - 50$
Running race(km)
$10$
$20$
$3$
$4$

10 - 20

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20 - 30

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30 - 40

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40 - 50

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Solution

The correct option is C $10 - 20$
To find the median class:
First add the total number of frequencies.
Here, $f = 37$
Formula to obtain the median class $= \frac{(T o t a l n u m b e r o f f r e q u e n c y + 1)}{2}$
So, Median class $= \frac{(37 + 1)}{2} = 19$
Hence, the median class of $19$ lies between the intervals $10 - 20.$

Suggest Corrections

Class	0 - 10	10 - 20	20 - 30	30 - 40	40 - 50	50 - 60	60 - 70	70 - 80
frequency	5	8	7	12	28	20	10	10

Time(min)	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$
Running race(km)	$10$	$20$	$3$	$4$

Height(cm)	$0 - 10$	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$
Number of players	$3$	$6$	$2$	$5$	$10$	$4$

Marks	$0 - 10$	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$
Frequency	$20$	$24$	$40$	$36$	$20$