Question

question
given:
set a = {10,11}
set b = {1,5,9,11}
what is a ∩ b?
answer
{1,5,9,10,11} {11}
{1,5,9} {5,9,10,11}

Explanation:

Step1: Identify set intersection definition

The intersection $A \cap B$ is the set of elements present in both $A$ and $B$.

Step2: List common elements

Set $A = \{10, 11\}$, Set $B = \{1, 5, 9, 11\}$. The only element in both sets is 11.

Answer:

$\{11\}$