the average age of three boys is 15 years.if their ages are in the ratio 3: 5:

Question

the average age of three boys is 15 years.if their ages are in the ratio 3: 5: 7, the age of the youngest boys is ?

Options:

A . 18 years

B . 13 years

C . 7 years

D . 3 years

Answer: Option D
Explanation :

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