Find the value of p when the mean of the following distribution is 20 ...

Name: Lido Learning Solutions
Uploaded: 2022-01-05T06:16:12+00:00
Description: R S Aggarwal Solutions - Mathematics - Class 9 Mean Median And Mode Of Ungrouped Data Mean Median And Mode Of Ungrouped Data Exercise 18B solutions written by Lido's expert teachers

Question

Find the value of p when the mean of the following distribution is 20

Accepted Answer

It is given that Mean 20 We know that Mean fi xi fi So we get 5p2 100p 295 15 5p 20 On further calculation 5p2 100p 295 300 100p So we get 5p2 5 By division p2 1 By taking square root p 1 Therefore the value of p is 1 14 The mean of the following distribution is 50

x	f
15	2
17	3
19	4
20 + p	5p
23	6

x	f	xifi
15	2	30
17	3	51
19	4	76
20+p	5p	100p + 5p2
23	6	138

RS Aggarwal Solutions Class 9 Mathematics Solutions for Mean Median And Mode Of Ungrouped Data Exercise 18B in Chapter 18 - Mean Median And Mode Of Ungrouped Data