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​Q17: Question – Paper 1 – June 2017

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• Probability Trees – Non-Replacement (example 2)​

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• Probability Trees – Non-Replacement

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Question

17)
​There are 9 counters in a bag.

7 of the counters are green.
2 of the counters are blue.

Ria takes at random two counters from the bag.

Work out the probability that Ria takes one counter of each colour.
​You must show your working.

[4 marks]

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