What is the probability of rolling a number greater than or equal to four when a fair die is rolled once?
What is 1/2
100
Lily rolls 2 number cubes, each with faces numbered 1-6. What is the probability that a number greater than 1 will come up on each cube?
25/36
100
A deck of cards has 3 blue, 4 black, and 6 purple cards. You pick 2 cards from the deck. Cards are not returned to the deck after they are picked.
P(two blue cards in a row)
What is 2/52 = 1/26
100
What is theoretical probability?
What you already know...."thinking"
100
You have a jar with 2 red jelly beans, 3 green jelly beans, and 5 yellow jelly beans. What is the probability that you randomly choose a red, eat it, and then a green jelly bean?
6/90 = 1/15
200
You toss a coin three times. What is the probability that it will land tails all of those three tosses?
What is 1/8
200
What is the probability of landing on heads when a penny is flipped and rolling an odd number when a number cube is rolled?
What is 3/12 = 1/4
200
A deck of cards has 5 pink, 2 gray, and 6 black cards. You pick 2 cards from the deck. Cards are not returned to the deck after they are picked.
P(the first card is gray and the second card is pink)
What is 5/78
200
What is experimental probability?
When you actually do something..."results"
200
You have a jar with 2 red jelly beans, 3 green jelly beans, and 5 yellow jelly beans. What is the probability that you randomly choose a yellow or a green jelly bean?
What is 8/10 = 4/5
300
Sarah rolls a dice three times. What is the probability that she will only roll numbers greater than 2 on all of her rolls?
8/27
300
You have a bag of 75 marbles. 48 are purple. What is the probability of pulling out a color other than purple?
27/75 = 9/25
300
Two balls are drawn successively without replacement from a box which contains 4 white balls and 3 red balls. Find the probability that the first ball drawn is white and the second is red.
What is 4/14 = 2/7
300
What are Independent Events?
When one doesn't affect the other.
300
What is the probability of drawing a diamond from a deck of cards, keeping it, and then drawing the ACE of clubs?
13/2652 = 1/204
400
You have a bag of 50 jelly beans. 24 are blue. What is the probability of pulling out a color other than blue?
26/50 = 13/25
400
Jake rolls a number cube and flips a coin at the same time. What is the probability that the coin will land on heads and the number cube will land on a multiple of 3?
What is 1/6
400
Your drawer contains 8 red socks and 6 green socks. It's too dark to see which are which. What is the probability that the first two you pick are both red socks?
What is 4/13
400
What are dependent events?
When one event affects the outcome another.
400
When rolling a number cube, what is the probability of rolling a 3, then not a 3, then a number greater than 2?
20/216 = 5/54
500
A book contains 32 pages numbered 1, 2, ..., 32. If a student randomly opens the book, what is the probability that the page number contains digit 1?
What is 13/32
500
A box contains 6 yellow, 2 black, and 4 green pencils. What is the probability of pulling out 2 green pencils (with replacement)?
16/24 = 2/3
500
The names of 9 boys and 6 girls from your class are put into a hat.
What is the probability that the first two names chosen will be a boy?
12/35
500
What are compound events?
When you are looking for more than one thing.
500
You have a 65% chance of pulling a red gummy bear out of a bag. What is the probability that you will not pull a red on your first pull, eating that one, and then pulling out a red on the second pull?