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प्रश्न
The average age of A, B, and C is 25 years. The Ratio of their ages is 3: 5: 7. Find the age of A.
विकल्प
21 years
18 years
15 years
Data Inadequate
MCQ
उत्तर
15 years
Explanation:
The average age of A, B and C = 25 years
Total age = 25 × 3 = 75
Age of A`=(3xx75)/(3+5+7)=15 "years"`
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Average and Age
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