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      Question

      The average age of a family of 6 people is 45 years. If

      the grandfather passes away, the average age drops to 40 years. Find the age of the grandfather.
      A 60 years Correct Answer Incorrect Answer
      B 65 years Correct Answer Incorrect Answer
      C 70 years Correct Answer Incorrect Answer
      D 75 years Correct Answer Incorrect Answer

      Solution

      Let the age of the person who died be β€˜x’ years. So, x + (45 – 5) Γ— 5 = 6 Γ— 45 x + 40 Γ— 5 = 270 x + 200 = 270 x = 270 – 200 x = 70 years So, age of the grandfather was 70 years.

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