The Normal Monthly Precipitation (In Inches) for August Is Listed

Multiple Choice

The normal monthly precipitation (in inches) for August is listed for 20 different U.S. cities. Find the mean monthly precipitation. $$\begin{array} { l l l l l } 3.5 & 1.6 & 2.4 & 3.7 & 4.1 \\3.9 & 1.0 & 3.6 & 4.2 & 3.4 \\3.7 & 2.2 & 1.5 & 4.2 & 3.4 \\2.7 & 0.4 & 3.7 & 2.0 & 3.6\end{array}$$

A) 3.27 in.
B) 2.80 in.
C) 3.09 in.
D) 2.94 in.