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Question 1 The weight of a box of chocolates of a certain brand follows a normal distribution with a mean of 85 grams and a

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Question 1 The weight of a box of chocolates of a certain brand follows a normal distribution with a mean of 85 grams and a standard deviation of 7 grams. During the promotion period, there are special sets each include two randomly selected boxes of chocolates. Use T to denote the total weight o chocolates in a special set. (a) Find the expectation, median, and standard deviation of T. (5 marks) (b) What is the probability that the weight of chocolates in a special set is less than 160 grams? mark

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