What is the probability of the following:(Enter an exact number)
An event A that is certain to occur?
An event B that is impossible?

Solution:

If an event A is to occur with certainty its probability is one.

Meaning it will definitely occur.

P(A) = 1

An example of a certain event would be the rising of sun in the morning which is a certainty.

Hence:

P(Sun rising in the morning) = 1

If event B is impossible, it implies it will never occur.

The probability of such an event is zero.

P(B) = 0

Example of an impossible event would be Probability of having 29 days in a non leap year.

P(Having 29 days in February in a non-leap year) = 0

What is the probability of the following:(Enter an exact number)
An event A that is certain to occur?
An event B that is impossible?

Summary:

The probability of the following: An event A that is certain to occur P(A) = 1 and an event B that is impossible is P(B) = 0