# Lab2-3 - Lab for Section 2.3 Name Use good notation and...

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Lab for Section 2.3 Name_________________________ Use good notation and show appropriate work. Write explanations in complete sentences . 1. (a) 7 1 1 1 8 4 (b) 75.348 ÷ 2.8 (c) 1 83 % 3 of 72 2. The two circles represent sets A and B . The dots inside the circles are the elements of the sets. Find the cardinal numbers of these sets. (a) n ( A B ) = (b) n ( A B ) = (c) ( ) n A = (d) n ( B A ) = 3. Let U = {Amy, Bob, Cam, Dot, Eve, Fred, Gabi}. Let M be the set of those taking mathematics and S be the set of those taking Spanish. Place each name in the appropriate region in the Venn Diagram. M = {Cam, Dot, Fred} S = {Bob, Cam} 4. Given U = { x : x is a letter in the alphabet}, A = { x : x is a letter in astronomy}, B = { x : x is a letter in biology}, and C = { x : x is a letter in chemistry}. (a) Example: A B = {a, s, t, r, o, n, m, y} {b, i, o, l, g, y} = {o, y} (b) A C (c) A C (d) B (e) B (f) A B (g) A U (h) B ʹ C ʹ (i) ( C B ) ʹ (j) A ( B C ) (k) ( A B ) × ( A C ) B A U S M

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5. Name the shaded region using the letters A and C , and the set operations. 6. A student club has eight members listed below. Name Class Major . (a) List the set of students that are juniors and
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