Question: Please answer 20. through 25. 20. Let U = {1, 3, 5, 7, 9, 11}, A = {1, 5, 9, 11}, B = {3, 5,

Please answer 20. through 25.

20. Let U = {1, 3, 5, 7, 9, 11}, A = {1, 5, 9, 11}, B = {3, 5, 7}, and C = {1, 3, 11}. List the elements of the indicated set. a.AnB b.UnB c. AUA' d.BnC' 21. Let A = {1, 2, 3}. List all the subsets of set A. 22. Jose is applying to college. He receives information on 6 different colleges. He will apply to all of those he likes. He may like none of them, all of them, or any combination of them. How many possibilities are there for the set of colleges that he applies to? 23. Use the inclusion-exclusion principle to answer the question. If n(A) = 5, 11(3) = 11, and n(A n B) = 3; what is n(A U B)? 24. In a survey of 1000 people, it was found that 720 watched television news programs daily and 434 read a newspaper daily. How many of those surveyed used both media to receive news? 25. Assume that the universal set U is the set of all students in a math class, who recently took a test. All students received an A, B, or C. Let A be the set of students who got an A, B the set of students who scored a B, and C the set of students who scored a C. Let D be the set ofmen, and E the set of women. Let F be the set of students who are business majors. Describe in words the following set. EnAnF

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