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A local university wanted to understand what students prefer to eat during finals. They asked 1,000 students, "Do you prefer chicken, burgers, or pizza?" The results of the survey are shown in the two-way table below:

\begin{tabular}{|l|l|l|l|}
\hline & Chicken & Burgers & Pizza \\
\hline Male & 127 & 218 & 125 \\
\hline Female & 219 & 192 & 119 \\
\hline
\end{tabular}

What is the probability that a person chosen at random from this survey prefers pizza, given that they are female? Round your answer to the nearest tenth.

A. 11.9\%

B. 12.5\%

C. 22.5\%

D. 48.8\%

Sagot :

To determine the probability that a person chosen at random from this survey prefers pizza, given that they are female, we can break down the problem into the following steps:

1. Calculate the total number of females in the survey:
The number of females who prefer chicken is 219, the number of females who prefer burgers is 192, and the number of females who prefer pizza is 119.
[tex]\[ \text{Total Females} = 219 + 192 + 119 = 530 \][/tex]

2. Identify the number of females who prefer pizza:
According to the table, 119 females prefer pizza.

3. Calculate the conditional probability:
The conditional probability that a person prefers pizza given that they are female is the ratio of the number of females who prefer pizza to the total number of females.
[tex]\[ P(\text{Pizza}|\text{Female}) = \frac{\text{Number of females who prefer pizza}}{\text{Total number of females}} \][/tex]
Substituting the numbers:
[tex]\[ P(\text{Pizza}|\text{Female}) = \frac{119}{530} \approx 0.22452830188679246 \][/tex]

4. Convert the probability to a percentage and round to the nearest tenth:
To convert the probability to a percentage, multiply by 100:
[tex]\[ 0.22452830188679246 \times 100 \approx 22.452830188679246 \][/tex]
Rounding this to the nearest tenth gives:
[tex]\[ 22.5\% \][/tex]

Therefore, the probability that a randomly chosen person from the survey prefers pizza, given that they are female, is approximately [tex]\( 22.5\% \)[/tex].

Thus, the correct answer is:
[tex]\[ \boxed{22.5\%} \][/tex]