Question

The average age of 25 persons is 30 years. 5persons are included,then the average age becomes 32 years.Find the average age of new persons.

Answer 1

Given:-

• Average age of 25 persons is 30 years
• Average age of 5 persons is 32 years.

To Find:-

• Find the average age of new persons.

Solution:-

Firstly,we will see sum of ages

Sum of ages of 25 persons = 25 × 30 = 750 years

Sum of ages of 30 persons = 30 × 32 = 960 years

Now we will find ages of 5 persons

$\: \: \sf \: ages \: of \: 5 \: persons = 960 - 750 = 210years$

Now find required average

$\: \: \sf \: = \frac{210}{5} = 42years$

Hence, average age of new persons is 42 years.