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A restaurant has a total of 60 tables. Of those tables, 38 are round and 13 are located by the window. There are 6 round tables by the window.

If tables are randomly assigned to customers, what is the probability that a customer will be seated at a round table or by the window?

A. \( \frac{29}{60} \)
B. \( \frac{47}{60} \)
C. \( \frac{41}{60} \)
D. \( \frac{45}{60} \)

Answer :

Given:

[tex]\begin{gathered} Total-table=60 \\ round-table=38 \\ window-side-table=13 \\ round-table(window-side)=6 \end{gathered}[/tex]

To Determine: The probability that a customer will be seated at a round table or by the window

Solution

Probability is a ratio of the number of favorable outcomes to the number of possible outcomes of the experiment

[tex]Probability=\frac{Number(outcome)}{Number(Possible-outcome)}[/tex][tex]\begin{gathered} P(round-table)=\frac{38}{60} \\ P(window)=\frac{13}{60} \\ P(round-window)=\frac{6}{60} \end{gathered}[/tex]

The probability that a customer will be seated at a round table or by the window would be

[tex]\begin{gathered} P(round-table,or,window)=P(round)+P(window)-P(round-window) \\ =\frac{38}{60}+\frac{13}{60}-\frac{6}{60} \\ =\frac{38+13-6}{60} \\ =\frac{51-6}{60} \\ =\frac{45}{60} \end{gathered}[/tex]

Hence, the probability that a customer will be seated at a round table or by the window is 45/60

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