The graph shows points scored by Riley-Ann in her first five basketball games. The difference between the mean and the median of the number of points that she scored is
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
Reading from the graph, Riley-Ann scored 8 points in Game 1, 7 points in Game 2, 20 points in Game 3, 7 points in Game 4, and 18 points in Game 5.

Therefore the mean number of points that she scored per game is $\frac{8+7+20+7+18}{5}=\frac{60}{5}=12$.

Since the ordered list (smallest to largest) of the number of points scored per game is $7,7,8,18,20$, then the median is 8 , the number in the middle of this ordered list.

The difference between the mean and the median of the number of points that Riley-Ann scored is $12-8=4$.

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