Let $\xi=\{1,2,3,4,5,6\}$, $A=\{1,3,5\}$, $B=\{5,1,3,3\}$ and $C=\{1,5\}$. Explain why

Question

Let $\xi=\{1,2,3,4,5,6\}$, $A=\{1,3,5\}$, $B=\{5,1,3,3\}$ and $C=\{1,5\}$. Explain why $A=B$.[1] State which of $A\subset B$ and $C\subset B$ is true. Justify both decisions.[2] State $n(B)$.[1]

Accepted Answer

(a) Same distinct elements (b) Only $C\subset B$ is true (c) $3$

Equality and proper containment

Equality and proper containment

Solution:

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