Calculate mean of the following data:

Values more than 0 10 20 30 40

Frequency 100 95 85 45 25

Open in App

Solution

Class Intervals
c.f. Mid Value
(m) Frequency
(f) fm

0 − 10
10 − 20
20 − 30
30 − 40
40 − 50 100
95
85
45
25 5
15
25
35
45 5
10
40
20
25 25
150
1000
700
1125

Σf = 100 Σfm = 3000

$X = \frac{Σ f m}{Σ f} = \frac{3000}{100} = 30$
Thus, the mean is 30.

Suggest Corrections

Similar questions

Variable	0−10	10−20	20−30	30−40	40−50	50−60	60−70
Frequency	10	20	35	40	25	25	15

X	0−10	10−20	20−30	30−60	60−90
Frequency	5	9	20	12	4

Class	less than 10	10−20	20−30	30−40	40−50	50−60	more than 60
Frequency	5	12	18	22	6	4	3

Size	5−10	10−15	15−20	20−25	25−30	30−35	35−40	40−45	45−50
Frequency	6	10	18	30	15	12	10	6	4

Find the median of the following data:

Class interval	$0 - 10$	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	Total
Frequency	$8$	$16$	$36$	$34$	$6$	$100$

Join BYJU'S Learning Program