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Heights follow a normal distribution with a mean of 150cm and a standard deviation of 20cm. (a) Find the probability a randomly chosen person is

Heights follow a normal distribution with a mean of 150cm and a standard deviation of 20cm. (a) Find the probability a randomly chosen person is exactly 2 meters tall (b) Find the probability a randomly chosen person is between 160cm and 180cm (c) Find the probability the average of 20 randomly chosen people is less than 145cm.

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