### Mathematics Class XI

Unit-I: Sets and Functions
Chapter 1: Sets
Unit-II: Algebra
Chapter 5: Binomial Theorem
Chapter 6: Sequence and Series
Unit-III: Coordinate Geometry
Chapter 1: Straight Lines
Chapter 2: Conic Sections
Unit-IV: Calculus
Unit-V: Mathematical Reasoning
Unit-VI: Statistics and Probability
Chapter 1: Statistics
Chapter 2: Probability

# Types of Events

(i) Impossible Event:

The empty set is called Impossible Event.

(ii) Sure Event:

The whole sample space is called the Sure Event.

(iii) Simple Event

If an event has only one sample point of a sample space, it is called a Simple (or Elementary) event.

Example:

Tossing two coins, a sample space is: (iv) Compound Event:

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

Example:

“Tossing a Coin twice”, the events : ‘exactly one head appeared.’ : ‘at least one head appeared.’ : ‘Almost one head appeared’.

Above all events are compound events and the subset of whole sample space . Each of the above events contains more than one sample point.

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