Find the intersections and unions of the following sets.

Ten students from a school appear in one or more subjects for an interschool quiz competition as shown in the table below.

\begin{tabular}{|c|c|c|}
\hline \begin{tabular}{c}
General \\
Knowledge
\end{tabular} & Math & Science \\
\hline Acel & Barek & Carlin \\
\hline Acton & Bay & Acton \\
\hline Anael & Max & Anael \\
\hline Max & Kai & Kai \\
\hline Carl & Anael & Dario \\
\hline Dario & Carlin & Barek \\
\hline
\end{tabular}

Let [tex]$G$[/tex] represent the set of students appearing for General Knowledge, [tex]$M$[/tex] represent the set of students appearing for Math, and [tex]$S$[/tex] represent the set of students appearing for Science.

Find [tex]$G \cap M$[/tex] and [tex]$G \cup S$[/tex].



Answer :

To solve this question, we'll start by defining the sets based on the information provided:

- [tex]\( G \)[/tex] represents the set of students appearing for General Knowledge: \{Acel, Acton, Anael, Max, Carl, Dario\}
- [tex]\( M \)[/tex] represents the set of students appearing for Math: \{Barek, Bay, Max, Kai, Anael, Carlin\}
- [tex]\( S \)[/tex] represents the set of students appearing for Science: \{Carlin, Acton, Anael, Kai, Dario, Barek\}

Step 1: Find the intersection of sets [tex]\( G \)[/tex] and [tex]\( M \)[/tex]
The intersection of two sets includes all elements that are present in both sets. So, we need to find the common elements between [tex]\( G \)[/tex] and [tex]\( M \)[/tex].

- [tex]\( G = \{Acel, Acton, Anael, Max, Carl, Dario\} \)[/tex]
- [tex]\( M = \{Barek, Bay, Max, Kai, Anael, Carlin\} \)[/tex]

Common elements between [tex]\( G \)[/tex] and [tex]\( M \)[/tex]:

- Anael
- Max

Therefore, [tex]\( G \cap M = \{ Anael, Max \} \)[/tex].

Step 2: Find the union of sets [tex]\( G \)[/tex] and [tex]\( S \)[/tex]
The union of two sets includes all elements from both sets, without duplicates. So, we need to combine all the elements from [tex]\( G \)[/tex] and [tex]\( S \)[/tex].

- [tex]\( G = \{Acel, Acton, Anael, Max, Carl, Dario\} \)[/tex]
- [tex]\( S = \{Carlin, Acton, Anael, Kai, Dario, Barek\} \)[/tex]

Combining all elements from [tex]\( G \)[/tex] and [tex]\( S \)[/tex]:

- Acel
- Acton
- Anael
- Max
- Carl
- Dario
- Carlin
- Kai
- Barek

Therefore, [tex]\( G \cup S = \{ Acel, Acton, Anael, Max, Carl, Dario, Carlin, Kai, Barek \} \)[/tex].

In summary:
- [tex]\( G \cap M = \{ Anael, Max \} \)[/tex]
- [tex]\( G \cup S = \{ Acel, Acton, Anael, Max, Carl, Dario, Carlin, Kai, Barek \} \)[/tex]