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    Question

    Average of first 4 numbers is 1.5 times the average of

    the next 2 numbers. If the average of all 6 numbers is 30, find the sum of the last 2 numbers.
    A 36 Correct Answer Incorrect Answer
    B 40 Correct Answer Incorrect Answer
    C 42 Correct Answer Incorrect Answer
    D 45 Correct Answer Incorrect Answer

    Solution

    Let the sum of the last 2 numbers be 'n'.
    (sum of first 4 numbers) ÷ 4 = 1.5 × (n/2)
    ⇒ sum of first 4 numbers = 3n
    Total sum = 3n + n = 4n
    Average = (4n)/6 = 30
    ⇒ 4n = 180
    ⇒ n = 45

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