Find the Indicated Probability Compute the Empirical Probability That at Most Two Heads Occur

Find the indicated probability.
-Three coins are tossed 80 times and the number of heads is recorded. The results are shown in the table below. $$\begin{array} { l | c c c c } \text { Outcome } & 0 \text { heads } & 1 \text { head } & 2 \text { heads } & 3 \text { heads } \\\hline \text { Frequency } & 27 & 9 & 11 & 33\end{array}$$ Compute the empirical probability that at most two heads occur.

A) $\frac { 3 } { 4 }$
B) $\frac { 47 } { 80 }$
C) $\frac { 2 } { 9 }$
D) 10