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Definition
Complementary Events
All Possible Combinations (tree diagrams)
Probability Questions
100
What are two numbers that probability is ALWAYS between?
0 and 1
100
What is the complement of the probability of 4/5?
1/5
100
List the possible combinations of a three types of shirts and two types of pants.
What is S1-P1 S1-P2 S2-P1 S2-P2 S3-P1 S3-P2
100
I have 3 ants and 4 grasshoppers. What is the probability of grabbing an ant?
3/7
200
What is theoretical probability?
The likeliness of an event happening based on all the possible outcomes.
200
There are 4 yellow marbles and 3 red marbles in a bag. What is the complementary event of the probability of drawing a yellow marble?
3/7
200
Make a tree diagram and list all the possible combinations of a painting or drawing. Each one can use a paintbrush, crayons, or markers.
What is Painting-paintbrush -crayons -markers Drawing-paintbrush -crayons -markers
200
Out of 5 snickers bars, 9 twix bars, and 10 skittles, what is the probability of drawing skittles?
What is 5/12
300
What is experimental probability?
The ratio of the number of times an event occurs to the total number of trials or times the activity is performed.
300
On a CD you burned for your friend, there were 12 rap songs, 2 country, and 6 alternative songs. What is the probability your friend will NOT pick a country song to play first?
9/10
300
For a trip, Bobby packed six different shirts, two pairs of pants, and four different sweaters. He plans to wear a shirt, a pair of pants, and a sweater each day of his trip. How many different outfits are possible?
What is 48
300
Kim has a bag containing 8 red, 4 blue, 3 yellow, and 2 green marbles. If she randomly chooses one marble from the bag, what is the probability that the marble will be blue?
What is 4/17
400
What is probability?
how likely/unlikely an event is to occur
400
What is the probability of landing on a letter that is NOT a B if a spinner has 2 B's, 2 G's, 3 R's and 1 Y?
3/4
400
At a restaurant, Hannah has the choice of chicken or steak. If she selects chicken, she can get beans or rice. If she selects steak, she can get corn, potatoes, or green beans. Draw a tree diagram that shows all the possible combinations of meat and side dishes that Hannah can select?
What is C-beans -rice S-corn -potatoes -green beans
400
Amanda has a box of 100 colored drinking straws. The box contains 40 red straws, 25 green straws, 20 yellow straws, and 15 purple straws. If she selects 1 straw without looking, what is the probability it will be yellow?
What is 1/5
500
Why is probability useful?
Probabilities are used to make predictions and decisions.
500
Johnny has 23 games in his room. He has 9 board games, and the rest are video games. If Johnny selects a game at random, which expression represents the probability that the game he selects will be a video game? a. 1 – 9/23 b. 1 – 9/14 c. 1 + 9/23 d. 1 + 9/14
a
500
Tim can choose from a truck, SUV, or smart car. The colors can be black, red, or silver. His interior can be leather or cloth. List all the possible combinations.
What is Truck-black-leather -cloth -red-leather -cloth -silver-leather -cloth SUV-black-leather -cloth -red-leather -cloth -silver-leather -cloth Smart car-black-leather -cloth -red-leather -cloth -silver-leather -cloth
500
There are 45 blue marbles, 89 red marbles, and 123 yellow marbles. What's the probability of drawing a red marble?
What is 89/257