Carbon monoxide (CO) emissions for a certain kind of car vary with mean 2.807 g/mi and standard deviation 0.6 g/mi. A company has 80 of these cars in its fleet. Let y represent the mean CO level for the company's fleet. a) What's the approximate model for the distribution of y? Explain. b) Estimate the probability that y is between 2.9 and 3.1 g/mi. c) There is only a 5% chance that the fleet's mean CO level is greater than what value? a) Select the correct choice below and, if necessary, fill in the answer boxes within your choice. O A. A Binomial model with trials and a probability of success of (Round to three decimal places as needed.) O B. A Poisson model with mean number of successes (Round to three decimal places as needed.) O C. A Normal model with mean and standard deviation

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Permutations and Combinations

If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.

Counting Theory

The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.