Every scientific experiment conducted to investigate the patterns in natural phenomenon may result with “events” which may or may not happen.

**Elementary
Probability Theory**

Every scientific experiment conducted to investigate the
patterns in natural phenomenon may result with “events” which may or may not
happen. Most of the events in real life have uncertainty in their happening.
For example,

Disintegration of a given atom of radium in a given time
interval may or may not disintegrate;

A plant may or may not be infected by species during rainy
season; The event of increase in the gold price under an economic condition in
a country; A drug administered to a cancer patient for curing a disease in a
period of time.

In all these cases, there is an amount of uncertainty prevails.
Even for a student, asking a particular question in the examination from a particular
portion of a subject is uncertain. Yet, the student is compelled to take a
decision during the preparation of examination, whether to go for an in-depth
study or leaving the question in choice. In a nutshell, one has to take a wise
decision under the conditions of uncertainty. In such a situation, knowledge
about the chance or probability for occurrence of an event of interest is vital
and calculation of probability for happening of an event is imperative.

It is very much essential to determine a quantitative value to
the chance or probability for the occurrence of random events in many real life
situations. Before defining probability, students gain knowledge on the
following essential terms.

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail

11th Statistics : Chapter 8 : Elementary Probability Theory : Elementary Probability Theory |

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