Q20. - Algebra 1

Question

JOBS The number of hours Maria and her friends each work at their part-time jobs is 20, 10, 8, 5, 25, 12 and 10 hours. Find the average amount of time Maria and her friends work at their jobs to the nearest hour.

Step-by-Step Solution

Answer

The average amount of time spent by Maria and her friends in their part-time job is approximately 13 hours.

Step 1. Write the formulae used.

The average/mean of a data is:

$\text{Average}=\frac{\text{sum of all the numbers in data}}{\text{Total number of numbers in data}}$

Step 2. Write the given information.

The number of hours of Maria and her friend working in a part-time job from the data given is 20, 10, 8, 5, 25, 12, and 10.

Step 3. DESCRIPTION OF STEP.

To find the average amount of time spent in their jobs use the formula of average as:

$$\begin{gathered} \text{Average}=\frac{20+10+8+5+25+12+10}{\text{7}} \\ =\frac{90}{7} \\ =12.86 \\ \approx 13 \end{gathered}$$

Thus, the average amount of time spent by Maria and her friends in their part-time job is approximately 13 hours.