The average age of three friends 3 years ago was 63 years. The average age of two of them 5 years ago was 50 years. What is the present age of the third friend?
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Answer:
15 years
Step-by-step explanation:
Total age of 3 boys =(25 × 3) years =75 years.
Ratio of their ages =3:5:7.
Age of the youngest = (75×
15
3
) years =15 years
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