Question
The average age of 3 friends is 24 years. If their ages are in the ratio 3:5:7, find the age of the oldest friend.
Solution
ATQ, Sum of their ages = 3 × 24 = 72 years Let their ages be ‘3x’, ‘5x’, and ‘7x’. So, 3x + 5x + 7x = 72 ⇒ 15x = 72 ⇒ x = 4.8 Age of oldest friend = 7x = 7 × 4.8 = 33.6 years
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