Compute and Interpret Probabilities Using the Empirical Method
-In 1999 the stock market took big swings up and down. A survey of 983 adult investors asked how often they tracked their portfolio. The table shows the investor responses. What is the probability that an adult investor tracks his or her portfolio daily Express your answer as a simplified fraction and as a decimal rounded to three decimal places.

\begin{array}{l|l}\hline \text { How frequently? } & \text { Response } \\\hline \text { Daily } & 240 \\\hline \text { Weekly } & 262 \\\hline \text { Monthly } & 281 \\\hline \text { Couple times a year } & 149 \\\hline \text { Don't track } & 51\end{array}

\frac { 240 } { 983 } ; 0.244

\frac { 262 } { 983 } ; 0.267

\frac { 281 } { 983 } ; 0.286

\frac { 149 } { 983 } ; 0.152

The chart below shows the percentage of people in a questionnaire who bought or leased the listed car models and were very satisfied with the experience.

\begin{array} { l l } \text { Model A } & 81 \% \\\text { Model B } & 79 \% \\\text { Model C } & 73 \% \\\text { Model D } & 61 \% \\\text { Model E } & 59 \% \\\text { Model F } & 57 \%\end{array}

Solve Counting Problems Using Combinations

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