Question

The mean temperature for the first 4 days in January was 8°C. The mean temperature for the first 5 days in January was 6°C. What was the temperature on the 5th day?

Answer 1

Answer:

So 9+9+9+9=36 / 4 = 9. So that's the first 4 days. Then the 5th day, the mean dropped to 7°C so that means the temperature dropped. -1 is your answer and you can check this by doing 9+9+9+9+(-1) = 35 / 5 = 7°C.

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