Find the Mean of the Random Variable $\begin{array}{c|ccccc}\mathrm{X} & 3 & 6 & 9 & 12 & 15 \\\hline \mathrm{P}(\mathrm{X}=\mathrm{x}) & 0.14 & 0.29 & 0.36 & 0.11 & 0.10\end{array}$

Multiple Choice

Find the mean of the random variable.
-The random variable X is the number of golf balls ordered by customers at a pro shop. Its probability distribution is given in the table. Round the answer to two decimal places when
Necessary. $\begin{array}{c|ccccc}\mathrm{X} & 3 & 6 & 9 & 12 & 15 \\\hline \mathrm{P}(\mathrm{X}=\mathrm{x}) & 0.14 & 0.29 & 0.36 & 0.11 & 0.10\end{array}$

A) $9.3$
B) $8.22$
C) $5.55$
D) 9