Make correct statements by filling in the symbols $\subset$ or $ \not\subset $ in the blank spaces:
$\{a, b, c\} \ldots\{b, c, d\}$
$\{ a,b,c\} \not\subset \{ b,c,d\} $
What universal set $(s)$ would you propose for each of the following :
The set of right triangles
Which of the following are examples of the null set
$\{ y:y$ is a point common to any two parallellines $\} $
In each of the following, determine whether the statement is true or false. If it is true, prove it. If it is false, give an example.
If $A \not\subset B$ and $B \not\subset C,$ then $A \not\subset C$
Which of the following are sets ? Justify your answer.
The collection of questions in this chapter.
