The mean temperature for the first 4 days in January was -2°C. The mean temperature for the first 5 days in January was -4°C. What was the temperature on the 5th day?

Question

asked Jul 22, 2019 106k views

1 Answer

Chinese Cat · Answer 1 · 2019-07-27T16:44:55+0000

Answer:

-12 degrees.

Explanation:

We remember that to calculate the average, we must add all values, then divide by the amount of values.

This means the first 4 days sum to -8 while the first 5 days sum to -20. Therefore, on the fifth day, the temperature was -12 degrees.