(a) The weights of blocks of chocolate have a normal distribution with a mean weight of 250 grams and a standard deviation of 5 grams. (i) What proportion of the blocks will weigh between 245 grams and 255 grams? (2) (ii) What is the probability that a block chosen at random will weigh less than 245 grams? (2)
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We are given that $X$ is normally distributed with mean $\mu = 250$ grams and standard deviation $\sigma = 5$ grams. Show more…
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