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[8 marks] The weights of a population of 15-year old boys are approximately normally distributed with mean 58.9 kg and standard deviation 5.8 kg. (a)

[8 marks] The weights of a population of 15-year old boys are approximately normally distributed with mean 58.9 kg and standard deviation 5.8 kg. (a) What proportion of these boys weigh between 50 kg and 62 kg? [5] (b) What is the chance that one of these boys, chosen at random, would weigh over 68 kg? [3

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