SIMPLE AND COMPOUND EVENTS IN PROBABILITY

The results or outcomes of a random experiment are known as events. Sometimes events may be combination of outcomes.

The events are of two types :

(i) Simple or Elementary,

(ii) Composite or Compound.

An event is known to be simple if it cannot be decomposed into further events.

Tossing a coin once provides us two simple events namely Head and Tail. On the other hand, a composite event is one that can be decomposed into two or more events.

Getting a head when a coin is tossed twice is an example of composite event as it can be split into the events

HT and TH 

which are both elementary events.

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