A group of 50 people were asked their gender and if they liked cats. The data from the survey are shown in the Venn diagram.

Determine the value for each variable in the two-way table.

\begin{tabular}{|c|c|c|c|}
\hline
& Likes & Dislikes & Total \\
\hline
Female & [tex]$a$[/tex] & 15 & [tex]$b$[/tex] \\
\hline
Male & [tex]$c$[/tex] & 16 & [tex]$d$[/tex] \\
\hline
Total & 19 & [tex]$e$[/tex] & 50 \\
\hline
\end{tabular}

\begin{array}{l}
a=\square \\
b=\square \\
c=\square \\
d=\square \\
e=\square
\end{array}



Answer :

Let's carefully break down the problem and populate the two-way table step-by-step.

1. Total Number of People:
- We know from the problem statement that the total number of survey participants is 50.

2. Total People Who Like and Dislike Cats:
- According to the data, 19 people like cats.
- Therefore, the total number of people who dislike cats is [tex]\( 50 - 19 = 31 \)[/tex].

3. Filling in the Total Column for Dislikes (e):
- We know the total number of people who dislike cats (31).
- Thus, [tex]\( e = 31 \)[/tex].

4. Number of Females Who Dislike Cats:
- We are given that 15 females dislike cats.

5. Number of Males Who Dislike Cats:
- If 31 people dislike cats in total, and 15 of them are females, then the remaining must be males.
- Therefore, the number of males who dislike cats is [tex]\( 31 - 15 = 16 \)[/tex].

6. Total Females (b):
- We need to find out the total number of females.
- We have 15 females who dislike cats and the number of females who like cats [tex]\( a \)[/tex].
- We can use the information that the number of males who like cats (hence, [tex]\( c \)[/tex]) will be [tex]\( 19 - a \)[/tex].
- Summing up all females:
[tex]\[ \text{Total Females} (b) = a + 15 \][/tex]

7. Total Males (d):
- We know the overall population (50) and we know the total number of females (b).
- Therefore, the total number of males will be [tex]\( 50 - b \)[/tex].

8. Females Who Like Cats (a):
- From previous information, we derive [tex]\( a = b - 15 \)[/tex].

Given the detailed data from the problem:

- Final Solution:

[tex]\[ a = 3 \ \text{(females who like cats)} \\ b = 18 \ \text{(total females)} \\ c = 16 \ \text{(males who like cats)} \\ d = 32 \ \text{(total males)} \\ e = 31 \ \text{(total who dislike cats)} \][/tex]

Therefore, the variables can be filled accordingly in the table:

[tex]\[ \begin{tabular}{|c|c|c|c|} \hline & Likes & Dislikes & Total \\ \hline Female & 3 & 15 & 18 \\ \hline Male & 16 & 16 & 32 \\ \hline Total & 19 & 31 & 50 \\ \hline \end{tabular} \][/tex]