Sets Test - 21...

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 

If  $$ A = \left \{ 2 , 4, 6, 8 \right \} $$ and $$ B = \left \{ 1, 4, 7, 8 \right \}$$ then A - B and B - A will be respectively:

If  $$ A = \left \{ 1, 2, 3, 4, 5, 6 \right \} , B = \left \{ 2, 4, 6, 8 \right \}$$, then A - B will be : 

If $$A= $${1,2,3};$$ B=$${4,5}. then $$A-B=$${1,2,3}  number cancellation of numbers in A and B

In an examination, $$34\%$$ of  the candidates fail in Arithmetic and $$42\%$$ in  English. If $$20\%$$ fail in Arithmetic and English, the  percentage of those passing in both subjects is :

The smallest set $$A$$ such that $$A\cup \left\{ 1,2 \right\} =\left\{ 1,2,3,5,9 \right\} $$ is 

If A = {1, 2, 3} B = {4, 5}, then find A - B.