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2 (a) Alex places 20 black counters and 8 white counters into a bag. She removes 8 counters at random without replacement. Find the probability

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2 (a) Alex places 20 black counters and 8 white counters into a bag. She removes 8 counters at random without replacement. Find the probability that the bag now contains exactly 5 white counters. [3] (b) Bill arranges 8 blue counters and 4 green counters in a random order in a straight line. Find the probability that exactly three of the green counters are next to one another. [4]

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