The Expected Number of Heads in 90 Tosses of an Unbiased

Short Answer

The expected number of heads in 90 tosses of an unbiased coin is: $$\begin{array} { | l | l | } \hline \text { A. } & 30 . \\\hline \text { B. } & 45 . \\\hline \text { C. } & 50 . \\\hline \text { D. } & 60 . \\\hline\end{array}$$