Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Basic Maths/Stats help??
Is (A ∪ B) ∩ (A complement ∪ B) just B? since A and A complement cancel out?
1 Answer
- 5 years agoFavorite Answer
Yes (A ∪ B) ∩ (A complement ∪ B) = B.
Although I'm not sure about how sound the idea of A and A complement cancelling out is .
Informally I reason as follows: It is clear that B is contained in the intersection. Also it is fairly clear that if B was not the whole intersection then A∩(A complement) would have to be not empty, which is a contradiction. So B is the whole intersection.
