Probability Review

An automobile dealer decides to select a month for its annual sale.  Find the probability that it will be September or October.

• 1/12
• 1/6
• 1/4
• 5/6

At a community swimming pool there are 2 managers, 8 lifeguards, 3 concession stand clerks, and 2 maintenance people.  If a person is selected at random, find the probability that the person is either a lifeguard or a manager.

• 2/3
• 8/15
• 2/15
• not enough information

A recent study of 200 nurses found that of 125 female nurses, 56 had bachelor's degrees:  and of 75 male nurses, 34 had bachelor's degrees.  If a nurse is selected at random, find the probability that the nurse is a female or has a bachelor degree.

• 159/200
• 125/200
• 215/200
• 90/200

Tags

CCSS.HSS.CP.B.7

A recent study of 200 nurses found that of 125 female nurses, 56 had bachelor's degrees:  and of 75 male nurses, 34 had bachelor's degrees.  If a nurse is selected at random, find the probability that the nurse selected is a male nurse with a bachelor's degree.

• 56/200
• 34/200
• 75/200
• 125/200

At a particular school with 200 male students, 58 play football, 40 play basketball, and 8 play both.  What is the probability that a randomly selected male student plays neither sport?

• 49/100
• 29/100
• 51/100
• 11/20

In a statistics class there are 18 juniors and 10 seniors;  6 of the seniors are females, and 12 of the juniors are males.  If a student is selected at random, find the probability of selecting a junior or a female.

• 24/28
• 12/28
• 18/28
• 6/28

Tags

CCSS.HSS.CP.B.7

The Bargain Auto Mall has these cars in stock.  If a car is selected at random, find the probability that it is Foreign and mid-sized.

• 20/300
• 135/300
• 155/300
• 40/300

The Bargain Auto Mall has these cars in stock.  If a car is selected at random, find the probability that it is Domestic or an SUV.

• 210/300
• 85/300
• 295/300
• 230/300

Tags

CCSS.HSS.CP.B.7

What is the probability of flipping a coin

3 times and getting 3 heads?

• 1/8

• 1/4

• 1/2

• 3/4

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