Fill in the Blank with One of the Words or Phrases

Multiple Choice

Fill in the blank with one of the words or phrases listed below. $$\begin{array} { l l l l l } \text { outcomes } & \text { bar } & \text { experiment } & \text { mean } & \text { tree diagram } \\\text { pictograph } & \text { line } & \text { class interval } & \text { median } & \text { probability } \\\text { histogram } & \text { circle } & \text { class frequency } & \text { mode } &\end{array}$$
-The_______ of a set of number items isis $\frac { \text { sum of items } } { \text { number of items } }$

A) mean
B) mode
C) probability
D) median