Certain, Impossible, Can be possible events

Suppose we have the following statements

1. Sun rises from the west
2. Ganga is the river in India
3. 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