12.If P(A) = .8000, P(B) = .6500, and P(A ∪ B) = .7800, then P(B|A) =a. .8375b. Not enough information is given to answer this question.c. .9750d. .670013.If A and B are independent events with P(A) = .4 and P(B) = .6, then P(A ∩ B) =14.A six-sided die is tossed 3 times. The probability of observing three ones in a row is:15.The probability of the intersection of two mutually exclusive events:

16.If a penny is tossed four times and comes up heads all four times, the probabilityof heads on the fifth trial is:a. .5b. 1/32c. larger than the probability of tails.d. Zero.17.Which of the following statements is(are) always true?18.Initial estimates of the probabilities of events are known as:19.An experiment consists of tossing 4 coins successively. The number of sample points in this experiment is:20.The symbol ∪ shows the:a. sum of the probabilities of events.b. union of events.c. intersection of events.d. sample space.21.A lottery is conducted using three urns. Each urn contains chips numbered from0 to 9. One chip is selected at random from each urn. The total number of sample points in the sample space is:22.If A and B are independent events with P(A) = .0500 and P(B) = .6500, then P(A|B) =23.If P(A) = .3800, P(B) = .8300, and P(A ∩ B) = .5700; then P(A ∪ B) =

24.If P(A|B) = .3,a. P(A|B^C) = .7b. P(B|A) = .7c. P(A^C|B^C) = .7d. P(A^C|B) = .725.The probability of at least one head in two flips of a coin is:26.Each customer entering a department store will either buy or not buy some merchandise. An experiment consists of following 3 customers and determining whether or not they purchase any merchandise. The number of sample points in this experiment is:27.Given that event E has a probability of .25, the probability of the complement of event E:28.The probability of an intersection of two events is computed using the:a. addition law.b. multiplication law.c. subtraction law.d. division law.29.If P(A) = .8500, P(A ∪ B) = .7200, and P(A ∩ B) = .6600, then P(B) =30.The "Top Three" at a racetrack consists of picking the correct order of the first three horses in a race. If there are 10 horses in a particular race, how many "Top Three" outcomes are there?

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