1) Three sets A, B,and C are defined as A={1,2,3,4}, B={1,2}, C={4,5}. Which of the following is (are) correct? a) B є A b) C \ A = {5} c) C \ A = {4} d) С є А e) A \ B ={6} f) A ∩ B ={6, 1, 4} 2) Given that set A={3, 7, 5, 1} and set B={4, 8, 9}. Determine A ∩ B. a) {4, 8, 9} b) ∅ c) {3, 7, 5, 1, 4, 8, 9} d) {3, 7, 5} e) {3, 8, 9} f) {3, 7, 5, 4, 8, 9} 3) There are 20 children in a group, 10 of them study French, and 12 study German. How many children learn only German? a) 22 b) 1 c) 11 d) 10 e) 20 f) 2 4) Given that set A={5, 3, 6} and set B={1, 4, 3, 5}. Which of these statements are correct? a) A ∩ B ={6, 1, 4} b) A ∪ B ={5, 3, 6, 1, 4, 3, 5} c) A ∪ B ={5, 3, 6, 1, 4} d) A \ B ={6} e) A ∩ B ={3, 5} f) A \ B ={1}

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