Suppose we have the following statements

- Sun rises from the west
- Ganga is the river in India
- India will win the test match

**
Statement 1
**
is always false,

as Sun rises from east

It is an impossible event

So, it’s Probability = 0

**
Statement 2
**
is always true.

as Ganga is a river in India

It is a certain event

So, it’s Probability = 1

**
Statement 3
**
is not always true or false.

India can win the match or not. Both are possible.

Hence, it is neither impossible, nor certain

So, probability will lie between 0 & 1

To summarise

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