\begin{tabular}{|c|c|c|}
\hline
Chicago & [tex]$\checkmark$[/tex] & \\
\hline
Peru & & \\
\hline
Miami & [tex]$\checkmark$[/tex] & \\
\hline
Canada & & [tex]$\checkmark$[/tex] \\
\hline
Mexico & & [tex]$\checkmark$[/tex] \\
\hline
\end{tabular}

Let event [tex]$A$[/tex] = The place is a city.
Let event [tex]$B$[/tex] = The place is in North America.

What is [tex]$P(A$[/tex] and [tex]$B)$[/tex]?

A. [tex]$\frac{4}{7}$[/tex]

B. [tex]$\frac{2}{7}$[/tex]

C. [tex]$\frac{5}{7}$[/tex]

D. [tex]$\frac{3}{7}$[/tex]



Answer :

To determine [tex]\( P(A \text{ and } B) \)[/tex], we need to calculate the probability that a place is both a city and in North America. We will follow these steps:

1. Identify the places and their properties:
- Chicago: City and in North America
- Peru: Not a city and not in North America
- Miami: City and in North America
- Canada: Not a city but in North America
- Mexico: Not a city but in North America

2. Count the number of places that are both cities and in North America:
- Chicago is a city and in North America.
- Miami is a city and in North America.

From the table, we see that there are 2 places that satisfy both conditions. Therefore, [tex]\( \text{Number of places that are both cities and in North America} = 2 \)[/tex].

3. Count the total number of places:
- The total number of places listed is 5.

4. Calculate [tex]\( P(A \text{ and } B) \)[/tex]:
- The probability of an event is given by the number of favorable outcomes divided by the total number of possible outcomes.

[tex]\[ P(A \text{ and } B) = \frac{\text{Number of places that are both cities and in North America}}{\text{Total number of places}} \][/tex]

Substituting the values we counted:

[tex]\[ P(A \text{ and } B) = \frac{2}{5} \][/tex]

Therefore, the probability [tex]\( P(A \text{ and } B) \)[/tex] is [tex]\( \frac{2}{5} \)[/tex], which is equal to 0.4. However, notice that none of the options exactly match [tex]\( \frac{2}{5} \)[/tex] or 0.4 in their given forms.

It seems the problem might have an issue with provided choices if matching exact values. None of the provided options (A through D) accurately represent [tex]\( \frac{2}{5} \)[/tex], or exactly 0.4.

Given the solution we've reached, the correct probability amongst provided options should ideally have been [tex]\( \frac{2}{5} \)[/tex].