Question

The mean height of the students in Marta's class is 60 in. There are 18 students in her class. Write and Solve and equation to find the total measure of all student's heights. (Hint, the mean is found by dividing the sum of all data values by the number of data values)

Answer 1

Solution: Let x be the height of a student in Marta's class.

The mean height of 18 students in Marta's class is 60 inches

We know that:

$Mean = \frac{\sum x_{i}}{n}$

$60 = \frac{\sum x_{i}}{18}$

$60 \times 18 = \sum x_{i}$

$\sum x_{i} = 1080$

Therefore, the total measure of all 18 student's heights is 1080 inches