Below Is a Probability Model for the Number of Automobiles $$\begin{array} { l c c c c } \text { Number of automobiles } & 0 & 1 & 2 & 3 \\\text { Probability } & 0.15 & 0.20 & 0.55 & 0.10\end{array}$$

Short Answer

Below is a probability model for the number of automobiles owned by a randomly chosen family in a large town. What is the mean number of automobiles owned? $$\begin{array} { l c c c c } \text { Number of automobiles } & 0 & 1 & 2 & 3 \\\text { Probability } & 0.15 & 0.20 & 0.55 & 0.10\end{array}$$