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PreQuiz 5

Probability
Name___________________________________
Date _______________________
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Find the indicated probability.
1) If a person is randomly selected, find the probability that his or her birthday is in May. Ignore leap years.
2) A survey resulted in the sample data in the given table. If one of the survey respondents is randomly selected,
find the probability of getting someone who lives in a flat.
Type of
accommodation
Number
House
333
Flat
306
Apartment
447
Other
618
Find the indicated probability by using the special addition rule.
3) The age distribution of students at a community college is given below.
Age (years)
Number of students (f)
Under 21
407
21

25
406
26

30
206
31

35
59
Over 35
28
1106
A student from the community college is selected at random. Find the probability that the student is between
26 and 35 inclusive. Round approximations to three decimal places.
4) The age distribution of students at a community college is given below.
Age (years)
Number of students (f)
Under 21
411
21

25
418
26

30
218
31

35
56
Over 35
20
1123
A student from the community college is selected at random. Find the probability that the student is at least 31.
Round approximations to three decimal places.
1
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This note was uploaded on 02/03/2012 for the course MATH 101 taught by Professor Lee during the Spring '11 term at International Institute for Higher Education.
 Spring '11
 Lee
 Statistics, Probability

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