Stats and Probability Unit Quiz (2)

A key ring has 12 keys, 3 of which open the house door. If two keys are randomly selected without replacement, what is the probability that neither key opens the door?

• $\frac{1}{22}$

• $\frac{6}{11}$

• $\frac{9}{16}$

• $\frac{21}{22}$

There are 9 movies showing at a theater. Two are action movies, two are children’s movies, and the other movies are comedies. Ashley randomly selects 2 different movies to see. What is the probability that the first movie is an action movie and the second movie is a comedy?

• $\frac{1}{18}$

• $\frac{10}{81}$

• $\frac{5}{36}$

• $\frac{7}{9}$

An experiment consists of spinning a spinner and flipping a fair coin. The spinner consists of 4 colored sections of equal size.

• Red

• Blue

• Green

• Yellow

If the arrow on the spinner is spun one time and the coin flipped one time, what is the probability of getting the outcome “Blue, Tails”?

• $\frac{1}{8}$

• $\frac{1}{6}$

• $\frac{1}{4}$

• $\frac{3}{4}$

A store has 20 boxes of cereal A and 10 boxes of cereal B. One box of each kind of cereal has a prize. If one box of each kind is randomly selected, what is the probability that neither box has a prize?

• $\frac{1}{200}$

• $\frac{29}{200}$

• $\frac{171}{200}$

• $\frac{199}{200}$

A single 6-sided die is rolled. What is the probability of rolling a number greater than 3 or an even number?

• 1

• 2/3

• 5/6

• None of the above

Tags

CCSS.HSS.CP.B.7

A farm has 5 brown cows and 10 white cows. A fence is open and two cows escape. What is the probability that it will be a brown cow, then a white cow?

• 1/9
• 2/9
• 5/21
• 10/21

What is the probability that math is a student's favorite subject, given that student is a mechanical engineer?

• 1.91

• 52%

• 17%

• 35%

Tags

CCSS.HSS.CP.A.4

What is the probability that a randomly selected student from the table plays an instrument or plays a team sport?

• 8/20

• 21/20

• 10/20

• 13/20

Tags

CCSS.HSS.CP.B.7

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Using the empirical rule, determine the interval that would represent the middle 68% of IQ scores.

• 90 - 110

• 60 - 130

• 85 - 115

• 100 - 115

Tags

CCSS.HSS.ID.A.4

When Aubree commutes to work, the amount of time it takes her to arrive is normally distributed with a mean of 23 minutes and a standard deviation of 3.5 minutes. Using the empirical rule, what percentage of her commutes will take longer than 30 minutes?

• 2.5%

• 16%

• 50%

• 47.5%

Tags

CCSS.HSS.ID.A.4