Let A = {3, 5, 6, 9, 10, 11} and B = {6, 7, 10, 11, 13, 17}. What is A ∩ B?
Note
A ∩ B means the elements common to both sets. Check each element and keep only those appearing in both A and B. The intersection keeps only the elements shared by both sets. Elements that appear in just one set are left out. The correct answer is {6, 10, 11}, which matches the calculation or reasoning shown.