Find the Expected Value for the Random Variable X Having $$\begin{array}{ll}\mathrm{a}=5 & \mathrm{~b}=6 \\\mathrm{c}=7 & \mathrm{~d}=8\end{array}$$

Multiple Choice

Find the expected value for the random variable x having this probability function.
- $$\begin{array}{ll}\mathrm{a}=5 & \mathrm{~b}=6 \\\mathrm{c}=7 & \mathrm{~d}=8\end{array}$$

A) 5.2
B) 7
C) 6.5
D) 5.5