Below is a partially completed probability model where X represents the number of cars in a fast food drive-thru at any given time. Answer the questions below. (a) Fill in the missing probability. Number 0 1 2 3 5 6 7 8 of cars P(x) 0.07 0.15 0.27 0.21 0.12 0.03 0.05 0.02 (b) What is the expected number of cars in the drive-thru? (c) What is the standard deviation? Round to 4 decimal places. (d) What is the probability there are 3 cars in the drive-thru? (e) What is the probability there are at least 5 cars in the drive-thru? (f) What is the probability there are less than 2 cars in the drive-thru? 4.

Here is the probability model for the blood type of a randomly chosen person in the United States. Blood type O A B AB Probability 0.53 0.22 0.06 0.19 What is the probability that a randomly chosen American does not have type O blood? ______________% Round to the nearest 0.01%

A used-car dealer gets complaints about his cars as shown in the table. Number of complaints per day Probability 0 1 2 0.01 0.04 0.2 4 5 6 0.3 0.11 0.09 Find the expected number of complaints per day. The expected number of complaints per day is (Do not round your answer.) 3 0.25

Several friends chartered a boat for a day's fishing. They caught a total of 63 fish. The table below provides information about the type and number of fish caught. Determine the empirical probability that the next fish caught is a kingfish. Fish Number caught Grouper Shark Flounder Kingfish 11 20 6 26 P(kingfish) = (Simplify your answer. Type a fraction.)