Find the Indicated Probability by Using the Special Addition Rule

question 125

Multiple Choice

Find the indicated probability by using the special addition rule.
-A relative frequency distribution is given below for the size of families in one U.S. city.
$\begin{array} { l c } \text { Size } & \text { Relative frequency } \\\hline 2 & 0.416 \\3 & 0.217 \\4 & 0.210 \\5 & 0.102 \\6 & 0.040 \\7 + & 0.015\end{array}$
A family is selected at random. Find the probability that the size of the family is between 2 and 5 inclusive. Round approximations to three decimal places.

• A)0.843
• B)0.945
• C)0.518
• D)0.427

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