Q21. - Algebra 1

Question

MOVIES At a movie theatre, ten movies are playing and their lengths are 105, 95, 115, 120, 150, 130, 100, 125, 110, and 135 minutes. Find the average length of a movie playing at this theatre to the nearest tenth.

Step-by-Step Solution

Answer

The average length of movie played in theatre is 118.5 minutes.

Step 1. Write the formulae used.

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 lengths of 10 movies played in theatre are 105, 95, 115, 120, 150, 130, 100, 125, 110, and 135 minutes.

Step 3. DESCRIPTION OF STEP.

To find the average length of movie played in theatre use the given data and formula for average mentioned above as:

$$\begin{gathered} \text{Average}=\frac{105+95+115+120+150+130+100+125+110+135}{\text{10}} \\ =\frac{1185}{10} \\ =118.5 \end{gathered}$$

Thus, the average length of movie played in theatre is 118.5 minutes.