Question: Directions
Read each problem carefully. Show all necessary solutions, illustrations, and explanations. Use proper mathematical notation.
Problem 1. Student Enrollment Analysis
A = Students enrolled in Programming = ${Anna, Ben, Carl, Dana, Ethan, Faith}$ B = Students enrolled in Networking = ${Carl, Dana, George, Hannah, Ethan}$
Questions: a. Determine $A \cup B$, $A \cap B$, $A - B$, and $B - A$. b. Explain what each answer represents. c. Which students are taking both subjects?
1. **State the problem:**
We have two sets:
$$A = \{Anna, Ben, Carl, Dana, Ethan, Faith\}$$
$$B = \{Carl, Dana, George, Hannah, Ethan\}$$
We need to find:
- $A \cup B$ (union of A and B)
- $A \cap B$ (intersection of A and B)
- $A - B$ (elements in A not in B)
- $B - A$ (elements in B not in A)
Then explain what each represents and identify students taking both subjects.
2. **Recall set operation definitions:**
- $A \cup B$ is the set of all elements in A or B or both.
- $A \cap B$ is the set of elements common to both A and B.
- $A - B$ is the set of elements in A but not in B.
- $B - A$ is the set of elements in B but not in A.
3. **Calculate each set:**
- $A \cup B = \{Anna, Ben, Carl, Dana, Ethan, Faith, George, Hannah\}$
- $A \cap B = \{Carl, Dana, Ethan\}$
- $A - B = \{Anna, Ben, Faith\}$
- $B - A = \{George, Hannah\}$
4. **Explain what each represents:**
- $A \cup B$ represents all students enrolled in Programming or Networking or both.
- $A \cap B$ represents students enrolled in both Programming and Networking.
- $A - B$ represents students enrolled only in Programming.
- $B - A$ represents students enrolled only in Networking.
5. **Answer the question about students taking both subjects:**
Students taking both Programming and Networking are those in $A \cap B$:
$$\{Carl, Dana, Ethan\}$$
**Final answers:**
- $A \cup B = \{Anna, Ben, Carl, Dana, Ethan, Faith, George, Hannah\}$
- $A \cap B = \{Carl, Dana, Ethan\}$
- $A - B = \{Anna, Ben, Faith\}$
- $B - A = \{George, Hannah\}$