The median class in the following frequency distribution is:
Class Interval: 0-10 10-20 20-30 30-40 40-50
Frequency 12 13 25 20 10

10 - 20

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20 - 30

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30 - 40

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none of these

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Solution

The correct option is B $20 - 30$

Class Frequency Cumulative Frequency
0-10 12 12
10-20 13 25
20-30 25 50
30-40 20 60
40-50 10 70

Now $\frac{N}{2} = 35$ . Hence cumulative frequency just greater than $35$ is $50$ . The corresponding class is $20 - 30$ .

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Similar questions

Class interval	0 - 10	10 - 20	20 - 30	30 - 40	40 - 50
Frequency	4	6	10	16	14

Class-interval:	0-10	10-20	20-30	30-40	40-50	50-60	60-70	70-80
Frequency:	$5$	$8$	$7$	$12$	$28$	$20$	$10$	$10$

Class-interval:	10-15	15-20	20-25	25-30	30-35	35-40
Frequency:	$30$	$45$	$75$	$35$	$25$	$15$

Class-interval:	25-30	30-35	35-40	40-45	45-50	50-60
Frequency:	$25$	$34$	$50$	$42$	$38$	$14$

Class interval:	0−10	10−20	20−30	30−40	40−50	50−60	Total
Frequency:	5	f₁	20	15	f₂	5	60

Class-interval:	0-10	10-20	20-30	30-40	40-50
No. of workers f:	7	10	15	8	10

Class Interval	Frequency
0 - 10 10 - 20 20 - 30 30 - 40 40 - 50	4 6 10 16 14

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