Binomial Distribution

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

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 exactly 2 of the first 20 blood donors have Type B blood? 

• 0.316
• 0.282
• 0.001
• Not here

Tags

CCSS.HSF-LE.A.1C

Suppose 39% of Americans will vote for Donald Trump on election day. If a random sample of 8 voters are selected, what is the probability that 6 or more will vote for Trump?

• .9635

• .0365

• .9561

• .0439

Tags

CCSS.HSS.CP.B.9

CCSS.HSS.MD.A.3

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

In Vietnam, the probability of rain is 70%.  Find the probability of it raining at most 2 days in a week.

• .9712
• 0.0250
• .0287
• .2988

Tags

CCSS.HSS.MD.A.3

In Vietnam, the probability of rain is 70%.  Find the probability of it raining at most 5 days in a week.

• .9712
• .6705
• .3294
• .5520

Tags

CCSS.HSS.MD.A.3

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.HSS.CP.B.9

A survey found that 25% of pet owners had their pets bathed professionally rather than do it themselves. If 18 pet owners are randomly selected, find the probability that exactly 5 people have their pets bathed professionally

• 3.42
• 1.03
• 0.072
• 0.199

Tags

CCSS.HSS.CP.B.9

CCSS.HSS.MD.A.3

A research team at Cornell University conducted a study showing that approximately 10% of all businessmen who wear ties wear them so tightly that they actually reduce blood flow to brain, diminishing cerebral functions. At a board meeting of 20 businessmen, all of whom wear ties, what is the probability that at least one tie is too tight?

• 27.0%

• 12.2%

• 73.0%

• 87.8%

Tags

CCSS.HSS.CP.B.9

CCSS.HSS.CP.B.7

The student who makes the morning announcements has the bad habit of saying “like” all the time. The chance that they say “like” in a sentence is 60%. You decide to keep a tally of how many times they say like. If they say 350 sentences this week, what is the probability that they will say “like” at least 200 times?

• 0.87
• 0.13
• 0.85
• 0.15

Tags

CCSS.HSS.ID.A.4

True or False:

exactly = binompdf

at most = binomcdf

at least = binomcdf

• True

• False