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      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.
      A 22.8 yrs Correct Answer Incorrect Answer
      B 18.5 yrs Correct Answer Incorrect Answer
      C 33.6 yrs Correct Answer Incorrect Answer
      D 42.3 yrs Correct Answer Incorrect Answer

      Solution

      ATQ, Sum of their ages = 3 ├Ч 24 = 72 years Let their ages be тАШ3xтАЩ, тАШ5xтАЩ, and тАШ7xтАЩ. So, 3x + 5x + 7x = 72 тЗТ 15x = 72 тЗТ x = 4.8 Age of oldest friend = 7x = 7 ├Ч 4.8 = 33.6 years

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