Yearly amounts of black carbon emissions from cars in India are normally distributed, with a mean of

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Yearly amounts of black carbon emissions from cars in India are normally distributed, with a mean of 14.7 gigagrams per year and a standard deviation of 11.5 gigagrams per year. Find the probability that the amount of black carbon emissions from cars in India for a randomly selected year are

(a) less than 12.3 gigagrams per year.

(b) between 15.4 and 19.6 gigagrams per year.

(c) greater than 17.7 gigagrams per year.


Find the indicated probabilities. If convenient, use technology to find the probabilities.

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