Question

Let $A=\{a,b,c,d\}$ and $B=\{b,d,f,g\}$. Find $A\Delta B.$

• A. $\{a,c,f\}$
• B. $\{a,c,f,g\}$
• C. $\{a,c\}$
• D. $\{c,f,g\}$

Answer 1

The correct option is B $\{a,c,f,g\}$

We have,

$(A-B)=\{a,c\}$ and $(B-A)=\{f,g\}$

$\therefore A\Delta B=(A-B)\cup (B-A)=\{a,c,f,g\}$