Probability Rules
Venn Diagrams
Geometric Probability
Binomial Probability
Probability Rules 2
100
The probability that a coin will land heads-up
What is 0.5?
100
At the Smith family barbecue, Mrs. Smith notices that 56% of her guests are drinking iced tea and 62% are drinking lemonade. How many have a cup of each?
18%
100
If you were to repeatedly roll a single die, what is the probability that you will roll your first 4 on your 4th roll?
0.0965
100
In Harry Potter, the percentage that a Defense Against the Dark Arts Professor tries to kill Harry Potter during his school time is 66%. What is the probability that at least three Defense Against the Dark Arts Professors try to kill him in a total of 6 years at Hogwarts?
0.8931
100
The probability that it will not rain if the chance of rain is 82%
What is 0.18?
200
What is 0.25?
200
When 226 people are asked which primary colors they like, 89 say yellow, 108 say red, and 93 say blue. 8 Like yellow and red, 7 like red and blue, 15 like yellow and blue, and 17 like all three. What is the probability that a randomly chosen person will like red or blue, but not both?
0.575
200
Daisy is selling Girl Scout cookies, and has figured out that 70% of the people whose doors she knocks on answer, and 50% of those people buy cookies. She is determined to sell at least one box today. What is the probability that she will have to visit at least 6 houses before she reaches her goal?
0.116
200
A study of 1000 domesticated rats states that 200 out of 1000 domesticated rats prefer strawberry flavored treats over peach flavored treats. However, a rat owner with 15 rats claims that 7 of her rats prefer strawberry treats over peach flavored treats. What is the probability of this happening if the study’s claim is correct?
0.0138
200
What is 0.5?
300
What is 0.75?
300
When 226 people are asked which primary colors they like, 89 say yellow, 108 say red, and 93 say blue. 8 Like yellow and red, 7 like red and blue, 15 like yellow and blue, and 17 like all three. Fill in the entire Venn diagram.
300
The probability of randomly picking an ace of spades from a 52-card deck
What is 0.019?
400
The probability of choosing a blue card from a stack of 3 red cards, 2 blue cards, and 5 yellow cards
What is 0.2?
400
Of the 100 customers at Dr. Johnson’s veterinary office, 55 have a cat, 53 have a dog, 34 have a hamster, and 4 have all three. In addition, 22 have only a cat, and 14 have a cat and a hamster. How many customers have a cat and a dog, but not a hamster?
19
400
The probability of choosing a peanut out of a pile with 300 almonds and 3 peanuts
What is 0.0099?