Consider the given discrete probability distribution. Find P(x > 3).
x 1 2 3 4 5
p(x) .1 .2 .2 .3 .2
A) .2 B) .5 C) .7 D) .3
Q. 2Unions and intersections cannot be defined for more than two sets, so that A B C and A B C are meaningless.
A) True B) False
Q. 3Unions and intersections of events are examples of compound events.
A) True B) False
Q. 4Fill in the blank. The __________ of two events A and B is the event that both A and B occur.
A) complement B) intersection C) union D) Venn diagram
Answer the question True or False.
Q. 5Fill in the blank. The __________ of two events A and B is the event that either A or B or both occur.
A) complement B) Venn diagram C) union D) intersection
Q. 6A consumer advocacy group rates the quality of a cellular service provider using three criteria.
A: Service is available at least 99 of the time.
B: Reception is clear at least 95 of the time.
C: Fewer than 5 of its customers have complaints about the quality of service.
a. Describe the event represented by A B C.
b. Describe the event represented by A B C.
Q. 7Explain why the following is or is not a valid probability distribution for the discrete random variable x.
x 1 3 5 7 9
p(x) .1 .1 .2 .1 .2
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