Question

find value of p if mean is 7.5​

Answer 1

mean = sum of observation / no. of observations

7.5 = 6+8+15+p+8+4/6

7.5*6 = 41+p

45-41=p

4 = p

Answer 2

The value of p is 3.

Step-by-step explanation:

Given : Data  

x :   3       5        7         9        11        13

f :    6       8       15         p        8        4

To find : The value of p if mean is 7.5​ ?

Solution :

The mean of the data is given by,

$M=\frac{\sum x_if_i}{\sum f_i}$

$7.5=\frac{3\times 6+5\times 8+7\times 15+9\times p+11\times 8+13\times 4}{6+8+15+p+8+4}$

$7.5=\frac{18+40+105+9p+88+52}{41+p}$

$7.5(41+p)=18+40+105+9p+88+52$

$307.5+7.5p=303+9p$

$9p-7.5p=307.5-303$

$1.5p=4.5$

$p=\frac{4.5}{1.5}$

$p=3$

Therefore, the value of p is 3.

#Learn more

Find the value of p if the arithmetic mean of 10,12,17,13,p is p

https://brainly.in/question/2316727