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    Question

    The average temperature for the 30 days of April was

    32°C. If the first 10 days of the month are excluded, the average temperature for the remaining days drops to 28°C. What was the average temperature for the first 10 days of April?
    A 40°C Correct Answer Incorrect Answer
    B 20°C Correct Answer Incorrect Answer
    C 30°C Correct Answer Incorrect Answer
    D 80°C Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Total sum of temperature for 30 days = 30 X 32 = 960 Total sum of temperature after excluding 10 days = 20 X 28 = 560 So, the total sum of temperature for the first 10 days = 960 - 560 = 400 So, required average = 400 ÷ 10 = 40°C

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