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Stats: Check-In's: 4.1- 4.5 Practice
Questions and Answers
Box A contains the numbers 1, 2, 3, and 4. Box B contains the numbers 5, 6, 7, and 8. A number is first
drawn from Box A and then another number from Box B. Using the figure below, how many outcomes
are possible if both numbers are even? - ANSWER✔✔-4
There are 27,842 undergraduate students enrolled at a certain university. The age distribution as follows:
Age Range: 13-14, 15-17, 18-22, 23-30, 31 and up.
Number: 2, 49, 11563, 9568, 6660.
Total 27,842
What is the probability that a student is between 23 and 30 years old? - ANSWER✔✔-0.344
For this year's mayoral election, voter dissatisfaction is very high. In a survey of 500 likely voters, 240 said
they planned to write in an independent candidate rather than vote for the Democrat or Republican
candidate for mayor.
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Estimate the percentage of voters who plan to write in an independent candidate? - ANSWER✔✔-48%
The staff at a small company includes: 4 secretaries, 20 technicians, 4 engineers, 2 executives, and 50
factory workers. If a person is selected at random, what is the probability that he or she is a factory
worker? - ANSWER✔✔-5/8
A section of an exam contains two multiple-choice questions, each with three answer choices (listed "A",
"B", and "C"). Assuming the outcomes to be equally likely, find the probability (as a reduced fraction)
that neither of the answers is "B". [Hint: List all the outcomes of the sample space first.] - ANSWER✔✔-
4/9
At a certain college, there were 700 science majors, 300 engineering majors, and 500 business majors. If
one student was selected at random, the probability that the student is an engineering major is -
ANSWER✔✔-1/5
A single card is drawn from a deck. Find the probability of selecting a heart or a 8. - ANSWER✔✔-4/13
An apartment building has the following distribution of apartments:
1st floor: 3 (1BR), 1 (2BR), 1 (3BR)
2nd floor: 1 (1BR), 3 (2BR), 2 (3BR).
3rd floor: 1 (1BR), 4 (2BR), 1 (3BR)
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If an apartment is selected at random, what is the probability that it is on the 2nd floor
or has 2 bedrooms? - ANSWER✔✔-11/17
The Statistics Club at Woodvale College sold college T-shirts as a fundraiser. The results of the sale are
shown below. Choose one student at random. Find the probability that the student sold 11-15 T-shirts or
less than 6 T-shirts.
No. of T-shirts: 0, 1-5, 6-10, 11-15, 16-20, 20+.
No. of Club Members: 2, 13, 10, 6, 5, 2 - ANSWER✔✔-0.5526
On a certain day, a cheese packaging facility packaged 500 units of mozzarella cheese. Some these
packages had major flaws, some had minor flaws, and some had both major and minor flaws. The
following table presents the results.
Major Flaw: 16 (Minor Flaw), 29 (No Minor Flaw)
No Minor Flaw: 60 (Minor Flaw), 395 (No Minor Flaw)
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