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The average age of 2 sisters is 16 years. If the age of brothers is also included, the average age of 3 siblings will be 14 years. Find the age of the brother?
1. 12
2. 13
3. 10 
4. 14

1 Answer

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Correct Answer - Option 3 : 10 

Given:

The average age of 2 sisters is 16 years. If the age of brothers is also included, the average age of 3 siblings will be 14 years.

Formula:

Average of n numbers a1, a2 ... an = (a1 + a2 + ... an)/n

Calculation:

The age of 2 sisters = 16 × 2 = 32

Let the age of brother be x years

As per question,

(32 + x)/3 = 14

32 + x = 42

x = 10 years

Hence, Brother’s age is 10 years

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