In a newspaper ad, a car dealer lists a 2001 Chrysler, a 2010 Ford, and a 2008 Buick If the numbers of inquiries he will get about these cars may be regarded as independent random variables having Poisson distributions with the parameters 1 3 6, 2 5 8, and 3 4 6, what are the probabilities that altogether he will receive (a) Fewer than 10 inquiries about these cars (b) Anywhere from 15 to 20 inquiries about these cars (c) At least 18 inquiries about these cars

Question: In a newspaper ad, a car dealer lists a 2001 Chrysler, a 2010 Ford, and a 2008 Buick. If the numbers of inquiries he will

In a newspaper ad, a car lists a 2001 Chrysler, a 2010 Ford, and a 2008 Buick. If the numbers of inquiries he will get about these cars may be regarded as independent random variables having Poisson distributions with the parameters λ1 = 3.6, λ2 = 5.8, and λ3 = 4.6, what are the probabilities that altogether he will receive
(a) Fewer than 10 inquiries about these cars;
(b) Anywhere from 15 to 20 inquiries about these cars;
(c) At least 18 inquiries about these cars?

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