1.
A class survey asks students of their theater preferences of comedy or mystery. The results are shown below.
Choose:
 60/105 60/95 60/188 60/83
 S U R V E Y MB Comedy Mystery Female 48 45 Male 35 60
Based upon this survey, what is the probability of a male from this school choosing mystery?

2.
A public opinion poll was taken to explore the relationship between age and support for a new mayoral candidate. The results are shown.
Choose:
 30/50 30/75 30/87 30/200
 Age MB For Against Undecided 21 - 40 30 12 8 41 - 60 20 40 15 Over 60 25 35 15
What is the probability that a person chosen at random is in the 21-40 age group and supports
the candidate?

3.
A company conducts a survey to explore how
their new tutoring software affects Test Averages of 8th grade students in Anderson Middle School.
 Software Use MB Student Test Averages < 65% 65-85% 86-100% Total Used 3 35 24 62 Not Used 2 41 30 73 Total 5 76 54 135
What is the probability that a student picked at random would have scored in the 86-100% range or would have used the tutoring software?
Choose:
 116/135 92/135 62/135 54/135

4.
A survey of 15-18 year olds asked if they used Twitter, or not. The results are shown below.
Choose:
 64/395 206/395 174/206 236/395
 S U R V E Y MB Female Male Tweets 174 159 Does Not Tweet 32 30
What is the probability that a person chosen at random is female or does not use Twitter?

5.
The school board surveyed the voting results regarding the building of a new football field.
 Voter's Age in years MB Votes YES NO Total 18-25 50 12 62 26-40 104 65 169 41-65 60 76 136 > 65 35 61 96 Total 249 214 463
a) If a voter is picked at random, what is the probability that the voter is in the 26-40 age group?

b) What is the probability of picking an older voter (> 65) or picking a "NO" voter?
a) Choose:
 65/149 104/169 169/463 249/463

b)
Choose:
 61/214 96/463 61/463 249/463

6.
High school seniors were surveyed as to their senior year course elective first choices. The results appear below.
 Gender MB Senior Elective Course Options PreCalculus Java Genetics Total Female 50 39 43 132 Male 40 30 48 118 Total 90 69 91 250

a) What is the probability that a student chosen at random is a female?

b) What is the probability that a student chosen at random selected Genetics?

c) What is the probability that a student chosen at random is a female and selected Genetics?

d) What is the probability that a student chosen at random is a female or selected Genetics?

e) What is the probability that a student chosen at random selected Genetics, given that the student is a female?

f ) What is the probability that a student chosen at random is a female, given that the student selected Genetics?

7.
A survey asked college juniors and seniors if they could study abroad, would they choose London, Pairs, or Madrid.
The results appear below.
 College Level MB Foreign Country for Study London Paris Madrid Total Junior 90 80 70 240 Senior 80 95 95 270 Total 170 175 165 510

a) What is the probability that a student chosen at random is not a junior?

b) What is the probability that a student chosen at random did not select Paris?

c) What is the probability that a student chosen at random is a junior and selected Madrid?

d) What is the probability that a student chosen at random is a junior and did not select Madrid?

e) What is the probability that a student chosen at random selected London, given that the student is a senior?

f ) What is the probability that a student chosen at random is a junior, given that the student selected Paris?

8.
Participants were asked to sample unknown colas
and choose their favorite. The results are shown in the table below.
 Blind study colas MB Gender Male Female Total Pepsi 50 52 102 Coke 45 70 115 Other 35 21 56 Total 130 143 273
a) If a participant is picked at random, what is the probability that the person is male or the chosen cola is Pepsi?

b) If a participant is picked at random, what is the probability that the participant is female given that the chosen cola was Coke?
a) Choose:
 50/273 182/273 130/273 232/273

b)
Choose:
 70/115 70/273 70/143 115/273