Northlake High School has two lunch periods. Students can eat their lunch in the cafeteria or on an outside patio. About [tex]$42\%$[/tex] of students who have first lunch eat outside. Compare this with the percentage of second-lunch students who eat outside.

\begin{tabular}{|c|c|c|c|}
\hline & Eat outside & Eat inside & Total \\
\hline First lunch & 0.19 & 0.26 & 0.45 \\
\hline Second lunch & 0.21 & 0.34 & 0.55 \\
\hline Total & 0.40 & 0.60 & 1.0 \\
\hline
\end{tabular}

Select the true statement:

A. A smaller percentage of second-lunch students ([tex]$38\%$[/tex]) eat outside.

B. A greater percentage of second-lunch students ([tex]$45\%$[/tex]) eat outside.

C. A smaller percentage of second-lunch students ([tex]$21\%$[/tex]) eat outside.

D. A greater percentage of second-lunch students ([tex]$55\%$[/tex]) eat outside.



Answer :

To determine the percentage of second-lunch students who eat outside, we need to analyze the data provided in the table.

1. Let's start by understanding the given data for both lunch periods:
- For the first lunch:
- Number of students eating outside is [tex]\(0.19\)[/tex].
- Number of students eating inside is [tex]\(0.26\)[/tex].
- Total number of students is [tex]\(0.45\)[/tex].

- For the second lunch:
- Number of students eating outside is [tex]\(0.21\)[/tex].
- Number of students eating inside is [tex]\(0.34\)[/tex].
- Total number of students is [tex]\(0.55\)[/tex].

2. Our objective is to find the percentage of second-lunch students who eat outside. The percentage can be calculated using the formula:
[tex]\[ \text{Percentage of second-lunch students who eat outside} = \left( \frac{\text{Number of students eating outside during the second lunch}}{\text{Total number of students during the second lunch}} \right) \times 100 \][/tex]

3. Substitute the given values into the formula:
[tex]\[ \text{Percentage of second-lunch students who eat outside} = \left( \frac{0.21}{0.55} \right) \times 100 \][/tex]

4. Perform the division to find the proportion:
[tex]\[ \frac{0.21}{0.55} \approx 0.3818181818181818 \][/tex]

5. Convert this proportion to a percentage:
[tex]\[ 0.3818181818181818 \times 100 \approx 38.18181818181818 \][/tex]

6. Rounding this number to the nearest whole number results in approximately [tex]\( 38\% \)[/tex].

Comparing this percentage to the options provided:
- A. [tex]\( 38 \% \)[/tex]
- B. [tex]\( 45 \% \)[/tex]
- C. [tex]\( 21 \% \)[/tex]
- D. [tex]\( 55 \% \)[/tex]

The correct statement is:
A. A smaller percentage of second-lunch students ( [tex]$38 \%$[/tex] ) eat outside.