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Please help this probability questions with clear steps, thanks you (b) A production line produces boxes of cereal with a mean of 500g and a

Please help this probability questions with clear steps, thanks you
(b) A production line produces boxes of cereal with a mean of 500g and a standard deviation of 100g. Assuming this forms a normal distribution, find the probability that a randomly selected box of cereal weighs: (i) more than 520g (ii)more than 490g (iii)between 490g and 520g. (iv)If a random sample of 25 boxes of cereal is selected, find the probability that the sample mean is more than 550g

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