Question

The average of ages of threee persons is 60 years . Those ages are in the proportion of 1:2:3. what is the age of the youngest one among them?
A)

Answer 1

Your Answer:

Given:-

• The average of ages of three persons is 60 years.
• The ages are in the ratio 1:2:3.

To find:-

• Age of the youngest person

Solution:-

Suppose the ages of three persons are x, 2x, 3x years respectively

So,

$\tt \dfrac{x+2x+3x}{3}=60 \\\\ \Rightarrow 6x = 3 \times 60 \\\\ \Rightarrow x= \dfrac{3 \times 60}{6} \\\\ \Rightarrow x = 30$

Hence, age of youngest person = x = 30 years.