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Select the correct answer.

For a one-week period, three bus routes were observed. The results are shown in the table below.

\begin{tabular}{|l|l|l|l|}
\hline
& On-Time & Delayed & Total \\
\hline
Bus Route A & 28 & 7 & 35 \\
\hline
Bus Route B & 37 & 8 & 45 \\
\hline
Bus Route C & 24 & 6 & 30 \\
\hline
Total & 89 & 21 & 110 \\
\hline
\end{tabular}

A bus is selected randomly. Which event has the highest probability?

A. The bus is from route [tex]$C$[/tex] and is delayed.
B. The bus is from route [tex]$C$[/tex] and is on time.
C. The bus is from route [tex]$B$[/tex] and is delayed.
D. The bus is from route [tex]$A$[/tex] and is on time.


Sagot :

To determine which event has the highest probability, let's analyze each option step by step.

Given the data from the table:
- Total buses observed: 110

Option A: The bus is from route [tex]\(C\)[/tex] and is delayed

- Number of delayed buses in route [tex]\(C\)[/tex]: 6
- Probability of selecting a bus from route [tex]\(C\)[/tex] that is delayed:

[tex]\[ \frac{6}{110} = 0.05454545454545454 \][/tex]

Option B: The bus is from route [tex]\(C\)[/tex] and is on time

- Number of on-time buses in route [tex]\(C\)[/tex]: 24
- Probability of selecting a bus from route [tex]\(C\)[/tex] that is on time:

[tex]\[ \frac{24}{110} = 0.21818181818181817 \][/tex]

Option C: The bus is from route [tex]\(B\)[/tex] and is delayed

- Number of delayed buses in route [tex]\(B\)[/tex]: 8
- Probability of selecting a bus from route [tex]\(B\)[/tex] that is delayed:

[tex]\[ \frac{8}{110} = 0.07272727272727272 \][/tex]

Option D: The bus is from route [tex]\(A\)[/tex] and is on time

- Number of on-time buses in route [tex]\(A\)[/tex]: 28
- Probability of selecting a bus from route [tex]\(A\)[/tex] that is on time:

[tex]\[ \frac{28}{110} = 0.2545454545454545 \][/tex]

Now, let's compare these probabilities:
- Probability of option A: 0.05454545454545454
- Probability of option B: 0.21818181818181817
- Probability of option C: 0.07272727272727272
- Probability of option D: 0.2545454545454545

The highest probability among these is [tex]\(0.2545454545454545\)[/tex], which corresponds to option D.

Therefore, the correct answer is:
D. The bus is from Route [tex]\(A\)[/tex] and is on time.
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