Which of the following is a true statement
Make correct statements by filling in the symbols $\subset$ or $ \not\subset $ in the blank spaces:
$\{a, b, c\} \ldots\{b, c, d\}$
What universal set $(s)$ would you propose for each of the following :
The set of isosceles triangles
Assume that $P(A)=P(B) .$ Show that $A=B$.
Write down all the subsets of the following sets
$\{ a\} $