Set Theory Test...

If $$A=\left\{2, 4, 6, 8, 10\right\}, B=\left\{1, 3, 5, 7, 9\right\}$$, then $$A-B$$ =____________

If A={1, 2, 4}, B={2, 4, 5}, C={2, 5}, then (A-C)$$\times$$(B-C) is equal to

If A and B are two sets such that $$n(A)=17, n(B)=23, n(A \cup B)=38$$, find $$n(A \cap B)$$.

Which of the following is set ?

If X and Y are two sets such that $$n(X)=45, n(X \cup Y)=76, n(X \cap Y)=12,$$ find $$n(Y)$$.

If A={$$x\in N$$ : xis a multiple of 3} and
B={$$x\in N$$ : is a multiple of 6}, then A-B is equal to

The number of subsets of the set $$A=\{ { a }_{ 1 },{ a }_{ 2 },.........{ a }_{ n }\} $$ which contain even number of elements is

Let $$S=\{2,4,6,8,......20\}$$. What is the maximum number of subsets does $$S$$ have ?

Which of the following collections is a set?

For sets $$\phi  , A = \left \{ 1,3 \right \} = B = \left \{ 1, 5, 9 \right \} , C = \left \{ 1, 5, 7, 9 \right \}$$ True option is