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    Question

    The average of 5 numbers is 40. If four of the numbers

    are 32, 35, 48 and 55, what is the fifth number?
    A 50 Correct Answer Incorrect Answer
    B 45 Correct Answer Incorrect Answer
    C 30 Correct Answer Incorrect Answer
    D 20 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Average of 5 numbers = 40 Sum of 5 numbers = 40 × 5 = 200 Sum of 4 given numbers = 32 + 35 + 48 + 55 = 67 + 48 = 115 = 115 + 55 = 170 Fifth number = 200 − 170 = 30

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