Binomial Probability Distribution

What is the probability of tossing a coin 5 times and having it land tails-side-up 4 of the 5 times?

• 7.8 %

• 80 %

• 1.6 %

• 20 %

In a certain town, 75% of all drivers are insured. What is the expected number of insured drivers present in a group of 200 randomly selected townspeople?

• 75

• 150

• 175

• 125

Tags

TEKS.MATH.A.3B

In a certain town, 90% of the people drive without ever looking at their phones. In a group of 200 randomly selected citizens, what is the variance?

• 18

• 4.24

• 180

• 90

At a certain restaurant, there is a 70% probability that the flowers on your table will be yellow. If you are there with a group that is occupying 6 tables, what is the probability that 5 of the tables will have yellow flowers?

• 70%

• 70.6 %

• 30.3 %

• 5.0 %

If you are randomly selecting a day, the probability of selecting a Saturday is 1/7. If 10 days are randomly selected, what is the standard deviation?

• 1.22

• 1

• 1/7

• 1.11

It is believed that 33% of adults HAVE NEVER read a book since graduating from high school.

If you randomly selected 500 post-high school adults, How many of them would you expect to find in that group who HAD read a book since high school?

• 335

• 33

• 165

• 67

Tags

TEKS.MATH.A.3B

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 

Find the mean of a binomial distribution with n=50 and p=0.4

• 50

• 4

• 20

• 10

Find the variance of a binomial distribution with 50 trials and p= 0.4

• 12

• 15

• 10

• 20

If p = 82%, what is q?

• 0.82

• 0.41

• 0.18

• 0.6724