Question

The union of the following pair of sets is:

$A=\{2,3,5,6,7\},B=\{4,5,7,8\}$

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

Answer 1

Answer: (C)

$A\cup B=\{2,3,4,5,6,7,8\}$

$AUB$ means "A union B", a set of elements (everything )that is in either of the sets. so the solution is all elements in both the sets.
Hence, option C is correct.