monthly test class 7th june

 $The\ symbol\ "\wedge"\ means$  

• and

• or

• empty

• None of these

In sets,the universal set acts as______for intersection

• union

• identity

• empty set

• None of these

Two sets are called____if there is at least one element common betweeen them.

• intersection

• union

• Overlapping

• None of these

to write an empty set,we use the symbol as:

• $\cup$

• $\cap$

• $\supset$

• None of these

 $IfA=\left\{1,2\right\}and\ B=\left\{a,b\right\},then\ A\cap B=--$  

•  $\phi$  

•  $\left\{1,2\right\}$  

•  $\left\{a,b\right\}$  

• None of these

 $If\ A=\left\{1,3\right\}\ and\ B=\left\{4,5,6\right\},then\ A\cup B=--$  

•  $\left\{1,2,3,4\right\}$  

•  $\left\{1,2,3,4,5\right\}$  

•  $\left\{1,2,3,4,5,6\right\}$  

•  $\left\{1,3,4,5,6\right\}$  

"A differnce B" is represented by:

• $A-B$

• $B-A$

• $A\cap B$

• None of these

The complement of a set B can be written as:

•  $B'$  

•  $B-U$  

•  $B'-U$  

• None of these

 $B'\cup B=$  _______

•  $\infty$  

•  $\phi$  

•  $\Phi$  

•  $U$  

The set consisting of only common elements of two sets is called the ______of two sets

• Union

• intersection

• difference

• None of these