Given the Contingency Table Shown Here, Find P(A or M)

Multiple Choice

Given the contingency table shown here, find P(A or M) . $\begin{array}{l}\quad\quad\quad\quad\quad\quad\quad\quad\text { Cell Phone Service Provider }\\\begin{array}{|c|c|c|c|c|}\hline County&\text { Sprint }(S) &\text { AT\&T }(A) & \text { Verizon }(I) & \text { Row Total }\\\hline Macomb (M) &17 & 25 & 8 & 50 \\\hline Oakland (O) &19 & 38 & 13 & 70 \\\hline Wayne (W) &24 & 37 & 19 & 80 \\\hline Col Total &60 & 100 & 40 & 200 \\\hline\end{array}\end{array}$

A) .2500
B) .7500
C) .6250
D) .1250