Question

3. The mean of 7 cm, 15 cm, 12 cm, 5 cm, h cm and
13 cm is 10 cm. Find the value of h.​

Answer 1

Step-by-step explanation:

Given:-

The mean of 7cm,15cm,12cm,5cm,hcm and 13cm is 10cm.

To find:-

Value of h

Solution:-

We know that

$\boxed{\sf Mean=\dfrac{Sum\:of\:terms}{Number\;of\:terms}}$

• Here number of terms is 6

$\\ \tt{:}\longrightarrow 10=\dfrac{7+15+12+5+h+13}{6}$

$\\ \tt{:}\longrightarrow 10=\dfrac{52+h}{6}$

$\\ \tt{:}\longrightarrow 52+h=10\times 6$

$\\ \tt{:}\longrightarrow 52+h=60$

$\\ \tt{:}\longrightarrow h=60-52$

$\\ \tt{:}\longrightarrow h=8$