19.Let U = (3.6,9,12). M=(3,6) and N = {9,12}, find MUN. M. {3,6,9,12) A. {6,9) T. (3,6} HO) 20. There are 28 students in Mr.Sison's Grade 7 class. The number of students in the Mathematics club and Science club is shown in the Venn diagram. Use the diagram to answer the following question. How many students are in both Mathematics and Science club? M. 2 A. 5 T.9 H. 12 Math Science 9 5 12 2 21. Refer to item 20, how many students are not members of either of the clubs? M.2 A. 5 T. 9 H. 12 S For s 22-24, refer to the given diagram. 22. A survey was conducted to determine who regularly buys products A, B, and C. The numbers are shown in The diagram below. How many people were surveyed? U M. 28 A. 34 T. 38 H. 50 B 23. How many buys product A but not B? 10 6 M. 10 A.13 2 T. 15 3 H. 20 7 24. How many do not choose any of the products? 4 С M.1 A. 2 T. 3 H.4