Probability

1) Beth and Shayna each purchase one raffle ticket. If a total of eleven raffle tickets are sold and two winners will be selected, what is the probability that both Beth and Shayna win?

• 1/55

• 1/2

• 1/3

• I give up!

A bag contains six real diamonds and five fake diamonds. If six diamonds are picked from the bag at random, what is the probability that at most four of them are real?

• 1/4

• 40%

• 45%

• 431/462

A fair coin is flipped ten times. What is the probability of the coin landing heads up exactly six times?

• 20%

• 105/512

• 25%

• This is too difficult.

Tags

CCSS.HSS.CP.B.9

A six-sided die is rolled six times. What is the probability that the die will show an even number exactly two times?

• 15/64

• 15 %

• 15/60

• 1/4

Tags

CCSS.HSS.CP.B.9

A meeting takes place between a diplomat and fourteen government officials. However, four of the officials are actually spies. If the diplomat gives secret information to ten of the attendees at random, what is the probability that no secret information was given to the spies?

• 1/1000

• 1/1001

• 1 percent

• Not possible

A basketball player has a 50% chance of making each free throw. What is the probability that the player makes at least eleven out of twelve free throws?

• 13/4096

• 13%

• 11%

• None of these

There are 4 seats for 10 individuals. How many ways can they order themselves ___ ____ _____ _____

• 10 x 10 x 10 x 10

• 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x1

• 10 x 9 x 8 x 7

• This is doing too much!

Using a 4 digit pin with letters and numbers, what is the chance you will guess the pin number on the first try?

• 36 x 36 x 36 x 36

• 10^4

• 36 x 10 x 36 x 10

• None of these answers

Given 25 marbles, which are 5 black, 4 green, 16 blue: What is the probability of picking a green marble on the first try?

• 5/25

• 16 %

• 4/25

• Both B and C.

A test consists of nine true/false questions. A student who forgot to study guesses randomly on every question. What is the probability that the student answers at least two questions correctly?

• 251/256

• 125/250

• 99%

• I don't like t/f questions.