Exam-Style Problem

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June 2013 p62 q7
2937

Susan has a bag of sweets containing 7 chocolates and 5 toffees. Ahmad has a bag of sweets containing 3 chocolates, 4 toffees and 2 boiled sweets. A sweet is taken at random from Susan’s bag and put in Ahmad’s bag. A sweet is then taken at random from Ahmad’s bag.

The random variable X is the number of times a chocolate is taken. State the possible values of X and draw up a table to show the probability distribution of X.

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