Find the Indicated Probability by Using the Special Addition Rule

Multiple Choice

Find the indicated probability by using the special addition rule.
-A percentage distribution is given below for the size of families in one U.S. city.
$\begin{array} { l c } \text { Size } & \text { Percentage } \\\hline 2 & 49.6 \\3 & 24.6 \\4 & 13.4 \\5 & 7.3 \\6 & 3.1 \\7 + & 2.0\end{array}$
A family is selected at random. Find the probability that the size of the family is at most 3. Round approximations to three decimal places.

A) 0.742
B) 0.258
C) 0.246
D) 0.496