A survey of 80 people found that 50 liked tea (T), 40 liked coffee (C), and 25 liked both. How many liked neither tea nor coffee? Solution:
For those looking for a "Set Theory Exercises and Solutions PDF" for university-level math, proofs are a must. Exercise 4: Prove that Assume .By definition of complement, .This means and .Therefore, .By definition of intersection, .Since every element in is also in , the subset relation is proven. Downloadable Practice Resources set theory exercises and solutions pdf