Answer:
1,5 answer of 1 St questions
1,2,5,7,9,12 answer 2nd questions
Explanation:
1.A ∩ B
A { 1, 2, 5, 7 } and B = { 1, 5, 9, 12 }.
They have both five and one so the answer is
A ∩ B= {1,5}
2. A ∪ B
You only need to list everything(but no repetition) so the answer is
{ 1, 2, 5, 7, 9, 12 }
1.6m questions
2.0m answers