Sets Test - 31...

If A and B are two sets, where A has more elements than B. Calculate the least possible value of n(A) + n(B), where n(A) is the number of elements in A and n(B) is the number of elements in B.

Solve the following inequalities: $$\displaystyle\frac{1}{2-|x|}\geq 1$$.

Which one of the following is correct?

Which one of the following is a finite set?

If $$X=\left \{ a,\left \{ b,c \right \},d \right \}$$, which of the following is a subset of $$X$$?

If $$A=\left \{ 5,\left \{ 5,6 \right \},7 \right \}$$, which of the following is correct? 

The number of subsets of the set $$\left \{ 10,11,12 \right \}$$ is

If $$n(A) = 20, n(B) = 30$$ and $$n(A \cup B)= 40$$, then $$n(A \cap B)$$ is equal to: 

For any three sets , A B and C, $$B\setminus (A \cup C)$$ is:

If $$A= \{ p, q, r, s \}$$, $$B = \{ r, s, t, u \}$$, then $$A /B$$ is: