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\begin{tabular}{|c|c|c|}
\hline
mousion & [tex]$\checkmark$[/tex] & \\
\hline
Peru & & \\
\hline
Miami & [tex]$\checkmark$[/tex] & \\
\hline
Toronto & [tex]$\checkmark$[/tex] & [tex]$\checkmark$[/tex] \\
\hline
Canada & & [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]$P(A \text{ and } B)$[/tex]?

A. [tex]$\frac{2}{7}$[/tex]
B. [tex]$\frac{3}{7}$[/tex]
C. [tex]$\frac{4}{7}$[/tex]

Sagot :

To determine [tex]\( P(A \text{ and } B) \)[/tex], we need to identify the places that satisfy both conditions: being a city (event [tex]\( A \)[/tex]) and being located in North America (event [tex]\( B \)[/tex]).

Given the places and their attributes:

1. mousion: This entry has no information about being a city or being in North America, so it doesn't count towards either event.
2. Peru: This is not a city, so it doesn't satisfy event [tex]\( A \)[/tex].
3. Miami: This is a city ([tex]\(\checkmark\)[/tex]) in North America ([tex]\(\checkmark\)[/tex]).
4. Toronto: This is a city ([tex]\(\checkmark\)[/tex]) in North America ([tex]\(\checkmark\)[/tex]).
5. Canada: This is not a city, just a country name, so it doesn't satisfy event [tex]\( A \)[/tex].

Now, let's count the total number of places and the number of places that satisfy both conditions:

- Total number of places: There are 5 places listed.
- Number of places that are both cities and in North America (event [tex]\( A \)[/tex] and event [tex]\( B \)[/tex]): Miami and Toronto are the ones that fit both criteria, making 2 places.

To find [tex]\( P(A \text{ and } B) \)[/tex], we divide the number of places that satisfy both conditions by the total number of places:

[tex]\[ P(A \text{ and } B) = \frac{\text{Number of places that are both cities and in North America}}{\text{Total number of places}} = \frac{2}{7} \][/tex]

Thus, the probability [tex]\( P(A \text{ and } B) \)[/tex] is:

A. [tex]\(\frac{2}{7}\)[/tex].

The correct answer is
[tex]\[ \boxed{\frac{2}{7}} \][/tex]