Question

multiple choice questions
A={7,8,9},B={2,3} C={9,10,11,12} then n [(AUC) xb]​

Answer 1

Answer:

12

Step-by-step explanation:

$A = \{7,8,9\}\\B= \{2,3\}\\C=\{9,10,11,12\}$

$A \cup C = \{7,8,9,10,11,12 \}$

$n(A \cup C) = 6\\n(B) = 2$

$\therefore n((A \cup C) \times B) = n(A \cup C) \times n(B) = 6 \times 2 = 12$