GCSE Maths (Edexcel)

435 videos | 33 hours

Independent Probability Tree Diagrams

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Probability Probability

Independent Probability Tree Diagrams

5:05 Probability Tree Diagrams
Spec P4 P6 P8
Previous Probability Tree Diagram Calculations Next Set Notation
  • Probability tree diagrams are used to show a series of events and the probabilities of different outcomes happening in a specific order.
  • If events in a probability tree are independent, the probabilities on the second set of branches will be the same, regardless of which first branch they stem from.
  • Independent events are events where the probability of the second event does not depend on whether the first event happens.
  • If events in a probability tree are dependent, the probabilities on the second set of branches will change depending on which first branch they stem from.
  • Dependent events are events where the probability of the second event changes depending on whether the first event happened.
  • In a probability tree diagram, the possible events on the second set of branches can also be dependent on the first branch.
  • To calculate missing probabilities in a probability tree diagram, you can use the fact that the probabilities in a set of branches add up to 1.
  • In independent events, the probabilities will be the same every time an event appears.

Please subscribe to access these revision notes.

This, and all other video notes, are included in our premium subscriptions.

Premium accounts get access to all videos and revision notes.