$$A=\{1,2,4,8\},\qquad B=\{2,3,5,8\}.$$ List $A\cup B$. Find $n(A\cup B)$. Explain why \(n(A)+n(

Question

$$A=\{1,2,4,8\},\qquad B=\{2,3,5,8\}.$$ List $A\cup B$. Find $n(A\cup B)$. Explain why $n(A)+n(B)$ is not the answer to part (b).

Accepted Answer

(a) $\{1,2,3,4,5,8\}$ (b) $6$ (c) $2$ and $8$ are counted twice

Sets