Find the Indicated Probability by Using the Special Addition Rule

question 115

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

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