Set Notation & Venn Diagrams Quiz

1. What does the symbol $\in$ mean?

• A. Is a subset of
• B. Is an element of
• C. Is the complement of
• D. Is the union of

2. What is $n(\varnothing)$?

• A. 1
• B. Undefined
• C. 0
• D. It depends on the universal set

3. If $A = \{1, 3, 5, 7\}$ and $B = \{3, 5, 9\}$, what is $A \cap B$?

• A. $\{1, 3, 5, 7, 9\}$
• B. $\{3, 5\}$
• C. $\{1, 7, 9\}$
• D. $\varnothing$

4. In a class of 25 students, 14 like Maths ($M$), 11 like Science ($S$), and 5 like both. How many like neither subject?

• A. 5
• B. 0
• C. 3
• D. 9

5. Given $\mathscr{E} = \{1,2,3,4,5,6,7,8\}$ and $A = \{2,4,6,8\}$, which set is $A'$?

• A. $\{1,3,5,7\}$
• B. $\{2,4,6,8\}$
• C. $\{1,2,3,4,5,6,7,8\}$
• D. $\varnothing$