How to work with a probability tree diagram 1 - GCSE maths

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@3minutemaths for quick reminder and GCSE walkthrough videos.

This video is all about how to work with a probability tree diagram and forms part of the playlist by the same name.

The question is aimed at around grade 5 GCSE maths and, once laid out, should be fairly straightforward ... although it's good to practice to ensure that you have the general principles in mind.

A coin is biased. When it is thrown, the probability that is lands on heads is 3/5. John throws the coin twice.

a) Complete the probability tree diagram.
b) Find the probability that the coins lands on heads both times.
c) Find the probability that the coin lands on heads at least once.

I hope the video helps and please do leave a comment - thanks!

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