The mean of the following data is 20.6 .Find the value of p.
Question:

The mean of the following data is 20.6 .Find the value of p.

Solution:

It is given that,

Mean = 20.6

$\Rightarrow \frac{25 p+530}{50}=20.6$

⇒ 25p + 530 = 20.6 × 50

⇒ 25p = 1030 − 530

⇒ 25p = 500

⇒ p = 500/25 = 20

⇒ p = 20

∴ p = 20.