Probability Revision

Barry Bonds has a career batting average of .298.  What is the probability that he will get on base 6 times in 10 at bats?

• 3.58%
• 5.46%
• 22.67%
• 100%

Tags

CCSS.HSS.CP.B.9

If you were to flip a coin 20 times, what is the probability you would get exactly 10 heads?

• 50%
• 17.62%
• .58.81%
• 41.19%

Tags

CCSS.HSS.CP.B.9

When rolling a fair die 100 times, what is the probability of rolling a "4"exactly 25 times?

• 1.0%
• 16.7%
• 25%
• 2.1%

Tags

CCSS.HSS.CP.B.9

CCSS.HSS.MD.A.3

If you were to flip a coin 20 times, what is the probability you would get at least 13 heads?

• 94.23%

• 13.16%

• 5.77%

• 7.39%

An algebra 2 test has 6 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each of the 6 questions, what is the probability that you get exactly 3 questions correct? (You need to figure out the p value first. It is not given to you.)

• 96.2%
• 13.2%
• 8.31%
• 25.0

Tags

CCSS.HSS.CP.B.9

Given the probability model in the table below, what is the expected value of the random variable?
  X        50          20        5
P(X)     0.1         0.3      0.6

• 14
• 4.67
• 5
• 7.5

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

CCSS.HSS.MD.B.5

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school. What is the probability that at least 2 of the first 10 blood donors has Type B blood? 

• 0.088
• 0.697
• 0.214
• 0.303 

Tags

CCSS.HSF-LE.A.1C

A crash my car on 8 journeys out of 10. I want to improve my driving. If I take 20 journeys in the future, what is the critical value at the 5% level that would see you agreeing that my driving has improved.

• 12

• 14

• 13

• 11

A call centre answers 60% of its calls within 1 minute. The management introduce a new telephone system and think it will change the answering times. If the company receives 40 calls, what are the critical values at the 10% level that would make management believe that the new system had changed things?

• 18 and 30

• 17 and 29

• 17 and 30

• 18 and 29

What is the probability that a student does play a sport given they do not play an instrument? 

• .2
• .2222
• .10
• .5

Tags

CCSS.HSS.CP.A.3

CCSS.HSS.CP.A.4

CCSS.HSS.CP.B.6

CCSS.HSS.ID.B.5