Question

1. ________ is a number that describes how likely it is that an event will occur.

Explanation:

In the context of probability theory (a subfield of Mathematics, specifically Statistics), probability is defined as a number (usually between 0 and 1, or sometimes 0% to 100%) that quantifies the likelihood of an event occurring. For example, if the probability of rain is 0.3, it means there's a 30% chance that it will rain.

Answer:

Probability