What is the mean and median of 7, 9, 12, 9, 13?

1 Answer
Jun 8, 2018

Mean=10

Median=9

Explanation:

Let's first order the numbers in ascending order. We now have

7,9,9,12,13

The mean is the average of our data set. We sum up our numbers, and divide by how many numbers there are. We have

color(red)((7+9+9+12+13))/color(blue)(5)=color(red)(50)/color(blue)(5)=10

The red expression is the sum of our data, and the blue is how many numbers we have. We find that the mean is 10.

The word "median" literally means the middle of something. In this case, it is the middle number in our data set.

cancel(7,9),color(darkviolet)(9),cancel(12,13)

The middle number is 9, therefore this is our median.

Hope this helps!