Question

if the mean of given data is 50, find the value of p class interval=0-20,20-40,40-60,60-80,80-100,frequency=17,28,32,p,19

Answer 1

Probably it's the ans.Hope it helps.

Answer 2

Answer:

The value of p=24.

Step-by-step explanation:

Given : The mean of given data is 50.

To find : The value of p

Solution :

Class interval-   0-20     20-40     40-60     60-80     80-100

Frequency-          17           28            32           p             19

$x_i$-         10          30            50           70           90

$f_ix_i$-     170        840          1600      70p          1710

Mean is defined as

$Mean=\frac{\sum f_ix_i}{\sum f_i}$

$50=\frac{170+840+1600+70p+1710}{17+28+32+p+19}$

$50=\frac{4320+70p}{96+p}$

$50\times (96+p)=4320+70p$

$4800+50p=4320+70p$

$20p=480$

$p=24$

Therefore, The value of p=24.