Applicants to a university were surveyed about their planned living arrangements for the coming year. The results of the survey are displayed in the two-way frequency table.

\begin{tabular}{|l|c|c|c|}
\cline { 2 - 4 }
\multicolumn{1}{c|}{} & On-Campus & Off-Campus & Total \\
\hline
Transfer Applicants & 38 & 66 & 104 \\
\hline
Freshman Applicants & 85 & 52 & 137 \\
\hline
Total & 123 & 118 & 241 \\
\hline
\end{tabular}

What is the probability that an applicant planning to stay off-campus is a transfer applicant?

A. 0.525
B. 0.559
C. 0.490
D. 0.635



Answer :

To find the probability that an applicant planning to stay off-campus is a transfer applicant, we can follow these steps:

1. Identify the number of transfer applicants who plan to stay off-campus.
2. Identify the total number of applicants who plan to stay off-campus.
3. Use these values to calculate the probability.

Given the two-way frequency table:

[tex]\[ \begin{array}{|l|c|c|c|} \hline & \text{On-Campus} & \text{Off-Campus} & \text{Total} \\ \hline \text{Transfer Applicants} & 38 & 66 & 104 \\ \hline \text{Freshman Applicants} & 85 & 52 & 137 \\ \hline \text{Total} & 123 & 118 & 241 \\ \hline \end{array} \][/tex]

1. The number of transfer applicants who plan to stay off-campus is 66.
2. The total number of applicants who plan to stay off-campus is 118.

Now the probability [tex]\( P(\text{Transfer Applicant}|\text{Off-Campus}) \)[/tex] is given by the ratio of transfer applicants staying off-campus to the total number of off-campus applicants:

[tex]\[ P(\text{Transfer Applicant}|\text{Off-Campus}) = \frac{\text{Number of Transfer Applicants staying Off-Campus}}{\text{Total Number of Off-Campus Applicants}} \][/tex]

Substituting the values:

[tex]\[ P(\text{Transfer Applicant}|\text{Off-Campus}) = \frac{66}{118} \][/tex]

Perform the division to find the probability:

[tex]\[ P(\text{Transfer Applicant}|\text{Off-Campus}) \approx 0.559 \][/tex]

So, the probability that an applicant planning to stay off-campus is a transfer applicant is approximately 0.559. Therefore, the correct answer is:

B. 0.559