Statistics Worksheet With Answer Key Page 15
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20From the information provided, create the sample space of
Find the indicated probability.
possible outcomes.
79) In one town, 53% of all voters are Democrats.
72) Friskie is having her fifth litter. The prior
If two voters are randomly selected for a
litters have either been three normal pups or
survey, find the probability that they are both
two normal pups and a runt. Assume the
Democrats.
probability of either outcome is 50%.
A) 0.530
B) 1.060
A) NNR NNN
C) 0.281
D) 0.276
B) NR NNR NNR
C) N NN NR NNN NRN
80) You are dealt two cards successively (without
D) NNN RNN NR
replacement) from a shuffled deck of 52
playing cards. Find the probability that both
Answer the question.
cards are black.
73) Find the odds against correctly guessing the
25
1
A)
B)
answer to a multiple choice question with 4
102
2,652
possible answers.
25
13
C)
D)
A) 3 : 4
B) 4 : 1
51
51
C) 3 : 1
D) 4 : 3
Provide a written description of the complement of the
Determine whether the events are mutually exclusive.
given event.
74) Find a ten dollar bill on the sidewalk.
81) When 10 adults are tested for high blood
Find a ten dollar bill on the grass.
pressure, at least one of the results are
A) No
B) Yes
positive.
A) Nine of the adults have high blood
Find the indicated probability.
pressure.
75) Find P(A), given that P(A) = 0.662.
B) None of the adults have high blood
A) 1.662
B) 0.338
pressure.
C) 0
D) 1.511
C) All of the adults have high blood
pressure.
76) A spinner has equal regions numbered 1
through 15. What is the probability that the
Find the indicated probability.
spinner will stop on an even number or a
82) An unprepared student makes random
multiple of 3?
guesses for the ten true-false questions on a
7
2
1
quiz. Find the probability that there is at least
A)
B)
C) 12
D)
9
3
3
one correct answer.
1
1
A)
B)
1,024
10
77) A 6-sided die is rolled. Find P(3 or 5).
1
9
1,023
A) 2
B)
C)
D)
6
10
1,024
1
1
C)
D)
3
36
Is Event B dependent or independent of Event A?
78) A: A mosquito lands on your arm.
B: You get a mosquito bite.
A) Dependent
B) Independent
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