If $P(A) = 0.25$,$P(B) = 0.50$,and $P(A \cap B) = 0.14$,then what is the value of $P(A \cap \overline{B})$?

If $\frac{2}{11}$ is the probability of an event $A$,what is the probability of the event 'not $A$'?

Let $U$ be the universal set of all the students of Class $XI$ of a coeducational school and $A$ be the set of all girls in Class $XI$. Find $A'$.

If $A$ and $B$ are any two sets,then $(A \cap B)'$ is equal to

Taking the set of natural numbers as the universal set,write down the complement of the following set:
$A = \{ x : x \text{ is a natural number divisible by } 3 \text{ and } 5 \}$

Let $U = \{1, 2, 3, 4, 5, 6, 7, 8, 9\}$,$A = \{1, 2, 3, 4\}$,$B = \{2, 4, 6, 8\}$,and $C = \{3, 4, 5, 6\}$. Find $(A \cup C)'$.