Question

Let $A=\{a,e,i,o,u\}$ and $B=\{a,b,c,d\}$. Is $A$ a subset of $B$? No, (Why?). Is $B$ a subset of $A$? No, (Why?).

Answer 1

Checking, is $A\subset B$?
Set $A=\{a,e,i,o,u\},B=\{a,b,c,d\}$
In set $A$, elements $e,i,o,u$ are present but they are not present in set $B$.
Hence $A\subset ̸B$.

Checking, is $B\subset A$?
In set $B$, elements $b,c,d$ are present but these elements are not present in set $A$.
Hence $B\subset ̸A$

Final Answer : $A\subset ̸B$ and $B\subset ̸A$