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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 ‘x’ years. So, x + (45 – 5) × 5 = 6 × 45 x + 40 × 5 = 270 x + 200 = 270 x = 270 – 200 x = 70 years So, age of the grandfather was 70 years.

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