The number of non-empty subsets of the set $\{1, 2, 3, 4\}$ is

Let $A = \{1, 2, 3, 4, 5, 6\}$. Insert the appropriate symbol $\in$ or $\notin$ in the blank space:
$10 \dots A$

Two dice are thrown. The events $A, B$ and $C$ are as follows:
$A:$ getting an even number on the first die.
$B:$ getting an odd number on the first die.
$C:$ getting the sum of the numbers on the dice $\leq 5$.
Describe the event $A$ or $B$.

If $R$ is the set of real numbers and $Q$ is the set of rational numbers,then what is $R - Q$?

For any sets $A$ and $B$,show that $P(A \cap B) = P(A) \cap P(B).$

Let $A = \{1, 2, \{3, 4\}, 5\}$. Which of the following statements is incorrect and why?
${1, 2, 3} \subset A$