" singlten element" is called _______ event.

Sample space itself is called _______ event.

If $\mathrm{A}\cap \mathrm{B}=\varnothing$ then events $\mathrm{A}$ and $\mathrm{B}$ are ______.

If $\mathrm{A}\cup \mathrm{B}=\mathrm{S}$ then $\mathrm{A}$ and $\mathrm{B}$ are _______ events.

A coin is tossed tice. What is its sample space?

Two cards are drawn from a bag containing four cards $\mathrm{A},\mathrm{B},\mathrm{C},\mathrm{D}.$ What is a sample space for this event?

In throwing a die, the event "getting even or odd" is _______.

In throwing a die, events A=getting odd and B=getting even are _______ events.

Let $\mathrm{U}=\{{\mathrm{x}}_1,{\mathrm{x}}_2,...,{\mathrm{x}}_{\mathrm{n}}\}$ . If $\mathrm{P}\left({\mathrm{x}}_1\right)=\mathrm{P}\left({\mathrm{x}}_2\right)=...=\mathrm{P}\left({\mathrm{x}}_{\mathrm{n}}\right)$ , then $\left\{{\mathrm{x}}_1\right\},\left\{{\mathrm{x}}_2\right\},...,\left\{{\mathrm{x}}_{\mathrm{n}}\right\}$ are called _______ events.

For impossible event $\mathrm{P}\left(\right\{\varnothing \left\}\right)=$ _______.