Gujarat BoardEnglish MediumSTD 9MathsProbability4 Marks
Question
Define an event.
✓
Answer
What are the meanings of event? The word event means something that result.
Definition: An event is a collection of outcomes of a trial of a random experiment.
To illustrate the definition, let us take examples:
$1.$ When two coins are tossed simultaneously, the possible outcomes are $HH, HT, TH$ and $TT$.
Any one outcome like $HH$ is called an event $($elementary event$)$.
The collections like ${HH, HT}, {HH, HT, TT}$ etc are all events $($compound event$)$.
$2.$ In the experiment of rolling a dice, the possible outcomes are $1, 2, 3, 4, 5$ and $6$.
Any one outcome like $4$ is called an event $($elementary event$)$.
The collections like ${1, 2}, {1, 2, 3}, {2, 5, 6}, {2, 3, 4, 5}$ etc are all events $($compound events$).$
Note that $H$ stands for getting a head and $T$ stands for getting a tail in the experiment of tossing a coin.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.