Question: AP tests again: During the 2008-2009 academic year. approximately 1.7 million students took one or more AP tests. Following is the frequency distribution of the

AP tests again: During the 2008-2009 academic year. approximately 1.7 million students took one or more AP tests. Following is the frequency distribution of the number of AP tests taken by students who took one or more AP tests.

Number of Tests Frequency (in 1000s) 953 423 194 80 29 8

Let X represent the number of exams taken by a student who took one or more.

a. Construct the probability distribution for X.

b. Find the probability that a student took exactly one exam.

c. Compute the mean fix.

d. Compute the standard deviation ax. S. Lottery tickets: Several million lottery tickets are sold. and 60% of the tickets are held by women. Five winning tickets will be drawn at random.

Number of Tests Frequency (in 1000s) 953 423 194 80 29 8 Total 1692

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