Binomial or Geometric?

A set of 20 cards consists of 10 purple cards and 10 green cards.  If you randomly pick a card after shuffling them and replace the card each time and wait until you get your first purple, what distribution is it

• binomial n = 20 and p=.5
• geometric p = .5
• neither
• normal distribution

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

A set of 20 cards consists of 10 purple cards and 10 green cards.  If you pick 7 cards at random and replace each time you pick, what is the probability you get exactly 3 purple cards.

• binomial n = 20 p = .5
• binomial n = 7 p= .5
• none
• geometric p =.5

In order for a random variable x to have a geometric distribution, which of the following must it satisfy

• not independent
• Succcess or failure
• set number of trials
• p>.7

Tags

CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.3

In order for a random variable x to have a binomial distribution, which of the following must it satisfy

• set number of trials
• not independent
• n = 20
• first success

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

8. An algebra 2 test has 5 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each of the 5 questions, what is the probability that you get at least 1 question correct?

• 0.2373
• 0.3955
• 0.7627
• 0.6045

Tags

CCSS.HSS.CP.B.7

CCSS.HSS.CP.B.8

CCSS.HSS.CP.B.9

An algebra 2 test has 6 multiple choice questions with 4 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?

• 0.962
• 0.132
• 0.831
• 0.250

The probability that Jalen makes a free throw is 75%. What is the probability he makes his first free throw on his third attempt?

• geometcdf(3, 0.75)
• geometpdf(0.75, 3)
• geometpdf(3, 0.75)
• geometcdf(0.75, 3) 

The local Chipotle is running a promotion where each large drink cup has a large pull-off tab that reveals a prize (free burrito!) or the message "Try again next time."  Chipotle claims that 25% of the cups have tabs with a  prize.  You visit Chipotle to try to win.  What is the probability that you win on your third visit?

• 0.86
• 0.14
• 0.42
• 0.58