Binomial & Geometric Quiz

Which of the following trials is geometric?

• the number of text messages until you get one from your mom
• the number of text messages that your mom sent
• the number of times the phones rings in a day
• The number of texts in a row that your mom sent

Tags

CCSS.HSF.BF.A.2

A September 2011 Gallup survey suggests that 38% of Americans are planning on voting for Barack Obama in the 2012 presidential election. Among a random sample of 100 people, approximately how many would you expect to vote for Obama? 

• 38 people
• 42 people
• 6 people
• Cannot be determined

If the probability that a house in your neighborhood has a dog is 60%, what is the chance that you find a house with a dog before the fifth house?

• 0.97
• 0.99
• 0.02
• 0.04

Tags

CCSS.HSS.CP.A.2

Peyton Manning completes 67% of his passes. What is the probability that it takes more than four throws to complete his first pass in a game?

• 0.99
• 0.01
• 0.04
• 0.96

Tags

CCSS.HSS.CP.A.1

CCSS.HSS.CP.A.2

CCSS.HSS.CP.B.8

A set of 20 cards consists of 10 purple cards and 10 green cards.  If you pick 7 cards at random without replacement what is the probability that you will get 3 purple cards out of the 7. 

• none-not independent
• binomial n =7 p=.5
• binomial n = 20 p= .5
• geometric p = .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 exactly 2 of the first 20 blood donors have Type B blood?

• 20 C 2 (.11)¹⁸(.89)²

• 20 C 2 (.11)²(.89)¹⁸

• (.11)¹⁸(.89)²

• (.11)²(.89)18

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

• 0.010
• 0.167
• 0.25
• 0.021

Tags

CCSS.HSS.MD.B.6

CCSS.HSS.MD.B.7

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.)

• 0.962
• 0.132
• 0.831
• 0.250

Tags

CCSS.HSS.CP.A.2

CCSS.HSS.CP.B.8

CCSS.HSS.CP.B.9

A test consists of 10 multiple choice questions with five choices for each question. As an experiment, you GUESS on each and every answer without even reading the questions.

What is the probability of getting exactly 6 questions correct on this test?

• 0.0058

• 0.00001

• 0.0064

• 0.0002

Bob is taking a 100 question test.  They have a 90 % probability of getting any one question correct.  WHICH IS THE CORRECT FORMULA TO FIND OUT THE PROBABILITY that they will answer EXACTLY 70  questions correctly?

• ₁₀₀C₇₀   ( 0.18  )³⁰ ( 0.90  )⁷⁰
  
• ₁₀₀C₇₀   ( 0.10  )³⁰ ( 0.90  )⁶⁰
• ₁₀₀C₇₀   ( 0.10  )³⁰ ( 0.90  )⁷⁰
• ₉₉C₇₀   ( 0.10  )³⁰ ( 0.90  )⁷⁰

Tags

CCSS.HSS.CP.B.9