Event -Find P (C1 or D1)

Short Answer

Event $$\begin{array}{l}\quad \quad \quad \quad \quad \quad \quad \quad \text { Event }\\\begin{array} { | c | c c c c | c | } \hline \text { Event } & \boldsymbol { C 1 } & \mathbf { C 2 } & \mathbf { C 3 } & \mathbf { C 4 } & \text { Total } \\\hline \text { DI } & 75 & 125 & 65 & 35 & 300 \\\text { D2 } & 90 & 105 & 60 & 45 & 300 \\\text { D3 } & 135 & 120 & 75 & 70 & 400 \\\hline \text { Total: } & 300 & 325 & 200 & 150 & 1000 \\\hline\end{array}\end{array}$$
-Find P (C1 or D1).