Probability Exam Worksheet With Answer Key - Math 211, Eastern Mediterranean University Page 20
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34MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
121) A multiple-choice test has five questions, each with five choices for the answer. Only one of the
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choices is correct. You randomly guess the answer to each question. What is the probability that
you answer the first two questions correctly?
A) 0.2
B) 0.02
C) 0.04
D) 0.4
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
122) A multiple-choice test has five questions, each with five choices for the answer. Only one
122)
of the choices is correct. You randomly guess the answer to each question. What is the
probability that you answer all five questions correctly?
123) A multiple-choice test has five questions, each with five choices for the answer. Only one
123)
of the choices is correct. You randomly guess the answer to each question. What is the
probability that you do not answer any of the questions correctly?
124) A multiple-choice test has five questions, each with five choices for the answer. Only one
124)
of the choices is correct. You randomly guess the answer to each question. What is the
probability that you answer at least one of the questions correctly?
125) The probability it will rain is 40% each day over a three-day period. What is the
125)
probability it will rain at least one of the three days?
126) The probability it will rain is 40% each day over a three-day period. What is the
126)
probability it will not rain at least one of the three days?
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
127) Four students drive to school in the same car. The students claim they were late to school and
127)
missed a test because of a flat tire. On the makeup test, the instructor asks the students to identify
the tire that went flat; front driverʹs side, front passengerʹs side, rear driverʹs side, or rear
passengerʹs side. If the students didnʹt really have a flat tire and each randomly selects a tire, what
is the probability that all four students select the same tire?
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1
1
1
A)
B)
C)
D)
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256
4
128) Find the probability that of 25 randomly selected students, no two share the same birthday.
128)
A) 0.569
B) 0.995
C) 0.068
D) 0.431
129) Find the probability that of 25 randomly selected students, at least two share the same birthday.
129)
A) 0.068
B) 0.569
C) 0.995
D) 0.432
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
130) What is the probability that a husband, wife, and daughter have the same birthday?
130)
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