Given the Contingency Table Shown Here, Find the Joint Probability $\quad$

Multiple Choice

Given the contingency table shown here, find the joint probability that a call sampled at random out of this population is local and 2-5 minutes long. $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Call Length (minutes) }$
$\begin{array}{|c|c|r|c|c|}\hline \text {Type of Phone Call} & 0-1 & 2-5 & 6+ & \text { Total } \\\hline \text { Local } &150 & 250 & 100 & 500 \\\hline \text { Long Distance } &170 & 120 & 10 \\\hline \text { Total } &320 & 370 & 110 & 300 \\\hline\end{array}$

A) .5000
B) .3125
C) .4000
D) .4625