The average age of three boys is 15 years and their ages are in proportion 3:5: 7. What is the age in years of the youngest boy...? Mcqs

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The average age of three boys is 15 years and their ages are in proportion 3:5: 7. What is the age in years of the youngest boy...?

(i) 9 years
(ii) 15 years

(iii) 18 years
(iv) 21 years



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