Compound Event

Definition

If an event has more than one sample point, it is called a Compound event.

For example, in the experiment of “tossing a coin thrice” the events

• $E$ : Exactly one head appeared
• $F$: At least one head appeared
• $G$: Utmost one head appeared etc.

are all compound events.

The subsets of $S$ associated with these events are

$E=\{HTT,THT,TTH\}$ , $f=\{HTT,THT,TTH,HHT,HTH,THH,HHH\}$

$G=\{TTT,THT,HTT,TTH\}$

Each of the above subsets contain more than one sample point, hence they are all compound events