Question

Match the following sets with their equal sets.

• A. $\{1,2,3,5,6\}$
• B. $\{a,b,b,c,c,c\}$
• C. $\{6,6,7,3,4,5\}$
• D. $\{e,c,d,b,c,a\}$

Answer 1

We know two sets are equal if all their elements and their cardianality are same.
Also, using the two conditions that repeatition of elements and order doesn't matter in the case of sets. We can conclude:

$\{a,b,c,d,e\}=\{e,c,d,b,b,c,a\}$

$\{a,b,c\}=\{a,b,b,c,c,c\}$

$\{6,7,3,4,5\}=\{6,6,7,3,4,5\}$

$\{6,5,2,3,3,1\}=\{1,2,3,5,6\}$