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The average number of calories in a 1.5-ounce chocolate bar is 225. suppose the distribution of calories is approximately normal with the standard deviation of

The average number of calories in a 1.5-ounce chocolate bar is 225. suppose the distribution of calories is approximately normal with the standard deviation of 10. Find the probability that randomly selected chocolate bar will have

a. Between 200 and 220 calories

b. Less than 200 calories

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