Question 897958
A ∩ B is the set of items that are in BOTH set A and set B


Notice how 25, 45 & 65 are in set A and in set B


So that means A ∩ B = {25, 45, 65} which is exactly equal to set B


It turns out that because B is a subset of set A, this means A ∩ B = B. This is one of the many properties of sets.