Question

If the mean of 40,50,x,78,58os 56.2 what is the value of x


​

Answer 1

1. Step-by-step explanation:

× = 55

...the value of x is 55

Answer 2

The value of x = 55

Step-by-step explanation:

Given,

The  mean of the observations = 56.2 and

Number of observations = 5

To find, the value of x = ?

We know that,

Mean $=\dfrac{Sum of all observations}{Total number of observations}$

⇒ $\dfrac{40+50+x+78+58}{5}=56.2$

⇒ $\dfrac{226+x}{5}=56.2$

⇒ $226+x=56.2\times 5$

⇒ $226+x=281$

⇒ $x=281-226=55$

∴ x = 55

Hence, the value of x = 55