Question

If the arithmetic mean of 7,8,x,11,14 is x , then x=

Answer 1

Arithmetic mean = (7+8+x+11+14)/5
x = (40+x)/5
5x = 40+x
4x = 40
x = 10
Answer: 10

Answer 2

Answer:

x = 10

Step-by-step explanation:

Data = 7,8,x,11,14

We are given that the mean of the data is x.

So, $Mean = \frac{\text{Sum of all observations}}{\text{Total no. of observations}}$

$x = \frac{7+8+x+11+14}{5}$

$x = \frac{40+x}{5}$

$5x =40+x$

$4x =40$

$x =10$

Hence the value of x is 10