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Probability

Probability

Course modified date: 9 Jun 2022

Learn about probability, different ways of putting a number to chance events, how to calculate the probability of events and order events by probability. This course is ideal for intermediate learners.

Introduction 

Probability refers to the likelihood or chance of something happening. It can be helpful to think of probability as a scale, ranging from the certain to the impossible.
The probability scale is a line with impossible things at one end and definite things at the other end. In the middle are things that are just as likely to happen as they are to not happen; we call this an even chance.
 
Here are some examples and their positions on a probability scale:
·       An example of something that is at one end of the scale and labelled impossible could be: ‘It is impossible to win the lottery if you haven’t bought a ticket!’.
·       An example of something that sits in the middle of the scale and labelled as having an even chance could be: ‘When you toss a coin you are just as likely to get heads as tails’.

·       An example of something that is at the other end of the scale and labelled as certain could be: ‘I am certain that the sun will set today’.

You will learn 

  1. Recognise different ways of putting a number to chance events
  2. Be able to calculate the probability of events
  3. Be able to order events by probability

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