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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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