If an Experiment Consists of Five Outcomes, With $P \left( O _ { 1 } \right) =$

Short Answer

If an experiment consists of five outcomes, with $P \left( O _ { 1 } \right) =$ 0.10, $P \left( O _ { 2 } \right) =$ 0.10, $P \left( O _ { 3 } \right) =$ 0.30, $P \left( O _ { 4 } \right) =$ 0.25, then $P \left( O _ { s } \right)$ is: $$\begin{array} { | l | l | } \hline \text { A. } & 0.75 . \\\hline \text { B. } & 0.25 . \\\hline \text { C. } & 0.20 . \\\hline \text { D. } & 0.80 . \\\hline\end{array}$$