💣 Q :58 Prep 1 Question Bank T1

a) If \( A = \{8, 9, 6\} \), and \( B = \{2, 6, 7\} \), then which set expresses \( A \cup B \)?

(a) \(\{6\}\)

(b) \(\{2, 7\}\)

(c) \(\{8, 9\}\)

(d) \(\{2, 6, 7, 8, 9\}\)

The correct answer is (d) \(\{2, 6, 7, 8, 9\}\).
The union \( A \cup B \) contains all elements that are in A, in B, or in both.

MR/Nasef.N

b) If \( A = \{8, 9, 6\} \), and \( B = \{2, 6, 7\} \), then which set expresses \( A \cap B \)?

(a) \(\{6\}\)

(b) \(\{2, 7\}\)

(c) \(\{8, 9\}\)

(d) \(\{2, 6, 7, 8, 9\}\)

The correct answer is (a) \(\{6\}\).
The intersection \( A \cap B \) contains only elements that are in both A and B.