Question

The mean temperature for the first 4 days in January was 7°C. The mean temperature for the first 5 days in January was 5°C. What was the temperature on the 5th day?

Answer 1

Answer:

temperature on the 5th days was -3 degree Celsius

Step-by-step explanation:

Mean is the average of the numbers

As per the statement:

The mean temperature for the first 4 days in January was 7°C.

Sum of the first 4 days temperature = $4 \cdot 7 = 28^{\circ} C$

It is also given that:

the mean temperature for the first 5 days in January was 5°C.

then;

Sum of the  first 5 days temperature = $5 \cdot 5 = 25^{\circ} C$

We have to find the temperature on the 5th days.

$\text{Temperature on 5th days}=\text{Sum of first 5 days temperature}-\text{Sum of first 4 days temperature}$

Substitute the given values we have;

$\text{Temperature on 5th days} = 25-28 =- 3^{\circ} C$

Therefore, the temperature on the 5th days was -3 degree Celsius