Given the Contingency Table Shown Here, If a Call Is $\quad$

question 16

Multiple Choice

Given the contingency table shown here, if a call is sampled at random, find the marginal probability that the call is long distance. $\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).3750
• B).6250
• C).4000
• D)300/500

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