EXAM P SAMPLE QUESTIONS - SOA
SOCIETY OF ACTUARIES
EXAM P PROBABILITY
EXAM P SAMPLE QUESTIONS
This set of sample questions includes those published on the probability topic for use with
previous versions of this examination. Questions from previous versions of this document that
are not relevant for the syllabus effective with the September 2022 administration have been
deleted. The questions have been renumbered. Unless indicated below, no questions have been
added to the version published for use with exams through July 2022.
Some of the questions in this study note are taken from past SOA examinations.
These questions are representative of the types of questions that might be asked of candidates
sitting for the Probability (P) Exam. These questions are intended to represent the depth of
understanding required of candidates. The distribution of questions by topic is not intended to
represent the distribution of questions on future exams.
Questions 271-287 were added July 2022.
Questions 288-319 were added August 2022.
Questions 234-236 and 282 were deleted October 2022
Questions 320-446 were added November 2023
Several questions that were duplicates of earlier questions were removed February 2024
Copyright 2024 by the Society of Actuaries.
Page 1 of 183
1.
A survey of a group¡¯s viewing habits over the last year revealed the following
information:
(i)
(ii)
(iii)
(iv)
(v)
(vi)
(vii)
28% watched gymnastics
29% watched baseball
19% watched soccer
14% watched gymnastics and baseball
12% watched baseball and soccer
10% watched gymnastics and soccer
8% watched all three sports.
Calculate the percentage of the group that watched none of the three sports during the last
year.
(A)
(B)
(C)
(D)
(E)
2.
24%
36%
41%
52%
60%
The probability that a visit to a primary care physician¡¯s (PCP) office results in neither
lab work nor referral to a specialist is 35%. Of those coming to a PCP¡¯s office, 30% are
referred to specialists and 40% require lab work.
Calculate the probability that a visit to a PCP¡¯s office results in both lab work and referral
to a specialist.
(A)
(B)
(C)
(D)
(E)
3.
0.05
0.12
0.18
0.25
0.35
You are given P[ A ¡È B] =
0.7 and P[ A ¡È B¡ä] =
0.9 .
Calculate P[A].
(A)
(B)
(C)
(D)
(E)
0.2
0.3
0.4
0.6
0.8
Page 2 of 183
4.
An urn contains 10 balls: 4 red and 6 blue. A second urn contains 16 red balls and an
unknown number of blue balls. A single ball is drawn from each urn. The probability
that both balls are the same color is 0.44.
Calculate the number of blue balls in the second urn.
(A)
(B)
(C)
(D)
(E)
5.
4
20
24
44
64
An auto insurance company has 10,000 policyholders. Each policyholder is classified as
(i)
(ii)
(iii)
young or old;
male or female; and
married or single.
Of these policyholders, 3000 are young, 4600 are male, and 7000 are married. The
policyholders can also be classified as 1320 young males, 3010 married males, and 1400
young married persons. Finally, 600 of the policyholders are young married males.
Calculate the number of the company¡¯s policyholders who are young, female, and single.
(A)
(B)
(C)
(D)
(E)
6.
280
423
486
880
896
A public health researcher examines the medical records of a group of 937 men who died
in 1999 and discovers that 210 of the men died from causes related to heart disease.
Moreover, 312 of the 937 men had at least one parent who suffered from heart disease,
and, of these 312 men, 102 died from causes related to heart disease.
Calculate the probability that a man randomly selected from this group died of causes
related to heart disease, given that neither of his parents suffered from heart disease.
(A)
(B)
(C)
(D)
(E)
0.115
0.173
0.224
0.327
0.514
Page 3 of 183
7.
An insurance company estimates that 40% of policyholders who have only an auto policy
will renew next year and 60% of policyholders who have only a homeowners policy will
renew next year. The company estimates that 80% of policyholders who have both an
auto policy and a homeowners policy will renew at least one of those policies next year.
Company records show that 65% of policyholders have an auto policy, 50% of
policyholders have a homeowners policy, and 15% of policyholders have both an auto
policy and a homeowners policy.
Using the company¡¯s estimates, calculate the percentage of policyholders that will renew
at least one policy next year.
(A)
(B)
(C)
(D)
(E)
8.
20%
29%
41%
53%
70%
Among a large group of patients recovering from shoulder injuries, it is found that 22%
visit both a physical therapist and a chiropractor, whereas 12% visit neither of these. The
probability that a patient visits a chiropractor exceeds by 0.14 the probability that a
patient visits a physical therapist.
Calculate the probability that a randomly chosen member of this group visits a physical
therapist.
(A)
(B)
(C)
(D)
(E)
0.26
0.38
0.40
0.48
0.62
Page 4 of 183
9.
An insurance company examines its pool of auto insurance customers and gathers the
following information:
(i)
(ii)
(iii)
(iv)
All customers insure at least one car.
70% of the customers insure more than one car.
20% of the customers insure a sports car.
Of those customers who insure more than one car, 15% insure a sports car.
Calculate the probability that a randomly selected customer insures exactly one car and
that car is not a sports car.
(A)
(B)
(C)
(D)
(E)
10.
0.13
0.21
0.24
0.25
0.30
An actuary studying the insurance preferences of automobile owners makes the following
conclusions:
(i)
An automobile owner is twice as likely to purchase collision coverage as
disability coverage.
(ii)
The event that an automobile owner purchases collision coverage is
independent of the event that he or she purchases disability coverage.
(iii) The probability that an automobile owner purchases both collision and
disability coverages is 0.15.
Calculate the probability that an automobile owner purchases neither collision nor
disability coverage.
(A)
(B)
(C)
(D)
(E)
0.18
0.33
0.48
0.67
0.82
Page 5 of 183
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