Chapter 1
Numbers and Operations
Course: Elementary Education Multiple Subjects 5001
Subject: Elementary Education Mathematics Subtest 5003
Chapter: Geometry And Measurement Data Statistics And Probability
1. Interprets Probabilities Relative to Likelihood of Occurrence
Understanding Probability
Probability is the study of how likely it is for an event to happen. In math, it is expressed as a number between 0 and 1 or as a percentage between 0% and 100%.
- A probability of 0 means the event is impossible (it cannot happen).
- A probability of 1 means the event is certain (it will definitely happen).
- A probability of 0.5 means the event is equally likely to happen or not happen.
Basic Probability Formula
Probability of an event = number of favorable outcomes ÷ total number of possible outcomes
For example, if you roll a fair 6-sided die, the probability of rolling a 2 is: 1 favorable outcome (rolling a 2) ÷ 6 total outcomes = 1/6