If the mean of the following distributions is 27, Find the value of p

Class 0-10 20-Oct 20-30 30-40 40-50

Frequency 8 p 12 13 10

Question

If the mean of the following distributions is 27, Find the value
of p

Class
0-10
20-Oct
20-30
30-40
40-50

Frequency
8
p
12
13
10

Ayush Jha · Accepted Answer

We can draw the following table:-

Class Interval
Class Marks(x)
Frequency(f)
(x)(f)

0-10
5
8
40

10-20
15
p
15p

20-30
25
12
300

30-40
35
13
455

40-50
45
10
450

Since,