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Year 10 Maths Core Probability

Tree Diagrams

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Questions
Question 1
207322

A marble is drawn from a bag. The tree diagram shows the probability of drawing a red marble (\(R\)). \(R'\) means "not red".

Tree diagram: one drawOne-stage tree with two branches: R with probability 0.3 and R′ (not red) with a question mark. 0.3 0.3 R ? ? R′

What probability belongs on the \(R'\) branch?

0.7
1 mark

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