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In this video we are going to look at how to use a Tree Diagram. A tree diagram shows all the possible outcomes of more than one event by following the possible paths along the branches of the tree. Tree diagrams utilise the “and” and “or” rules of probability for multiple events

There are two types of tree diagrams, for two types of situations: Dependent and Independent. Dependent tree diagrams occur when the second probability is affected by the first. For example, if a coloured counter is chosen and not replaced, the second probability is changed. Independent probabilities are completely separate from each other and so the second choice remains the same, no matter the first. These types of tree diagrams are often easier for this reason.


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