# What is the probability of the following?

# (a) An event that is certain to occur?

Probability defines the likelihood of the occurrence of an event.

## Answer: The probability of an event that is certain to occur is 1.

Let's look into an example to understand this

**Explanation:**

We know that,

**Probability of an event (E) = Number of favorable outcomes / Total number of outcomes**

The probability of an event that is certain to occur can be considered as a sure event that always occurs whenever an experiment is performed.

Example:

a) Probability of sunrise is equal to 1

b) Probability of getting a number between 1 to 6 on rolling a die is equal to 1