Question

The mean temperature for the first 7 days in January was 9 °C. The temperature on the 8th day was 8 °C. What is the mean temperature for the first 8 days in January

Answer 1

8.875 degrees Celsius

Explanation:

Answer 2

`8.875\°C`

Explanation:

Let

x ----> the mean temperature for the first 8 days in January

we know that

The mean temperature for the first 7 days in January multiplied by 7 is equal to the sum of the temperatures for the first 7 days

9(7)=63°C

so

The sum of the temperatures for the first 7 days plus the temperature on the 8th day, all divided by 8 is equal to the mean temperature for the first 8 days in January

`x=(63+8)/(8)=8.875\°C`