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.