Sets Relations And Functions Question 76

Question: If $A=\{2,3,7,9\}, B=\{3,7,8\}$, then $A \Delta B$ is

Options:

A) {3, 7}

B) {2, 8, 9}

C) {2, 3, 7, 8, 9}

D) {3, 8, 9}

Show Answer

Answer:

Correct Answer: B

Solution:

  • [b] $ A-B={2,9},B-A={8} $

$ \Rightarrow A\Delta B=(A-B)\cup (B-A)={2,8,9} $