Question

An event which has only ...... sample point of a sample space, is called simple event.

• A. two
• B. three
• C. one
• D. zero

Answer 1

Answer: (C)

If an event $E$ has only one sample point of a sample space, then it is called a simple (or elementary) event. In a sample space containing $n$ distinct elements, there are exactly n simple events.
For example, in the experiment of tossing two coins, a sample space is, $S=\{HH,HT,TH,TT\}$
There are four simple event corresponding to this sample space. There are $E_1=\{HH\},E_2=\{HT\},E_3=\{TH\}$ and $E_4=\{TT\}$