Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.3 | 0.7 | | yellow | orange | | Color |
Probability of Type
| | 0.8 | 0.2 | | wagon | sedan | | Type |
What is the probability of a car being a orange wagon? | |
[2] | Flip 3 coins.
What is the probability of getting 3 heads? | |
[1] |
Roll 4 6-sided dice.
What is the probability of getting 4 numbers that are even? | |
[1] | A bag has 3 red balls and 9 blue balls. You take out 1 red ball, then another ball.
What is the probability of getting red for the second ball? | |
[1] |
There are 50 balls in a bag. This is is the probability distribution of their color:
How many red balls were in the bag? | |
[1] | A group of boys were timed running 100m. Here are the results:
What fraction of the boys run 100m in less than 17s?
| |
[2] |
There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.3 | 0.4 | 0.3 | | purple | pink | orange | | Color |
If you choose a random ball from the bag, what is the probability of it being orange? | |
[1] | You roll a 4 sided die and a 6 sided die.
What is the probability of getting 5 on both dice? | |
[1] |
There are 100 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.4 | 0.4 | | purple | orange | pink | | Color |
How many purple balls were in the bag? | |
[1] | There are 24 balls in a bag. This is is the probability distribution of their color:
How many red balls were in the bag? | |
[1] |
A Crazy Die has 5 sides, but each side has a different probability of being rolled. This is is the probability distribution of the sides being rolled:
| | 0.05 | 0.1 | 0.1 | 0.1 | 0.65 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than or equal to 4? | |
[1] | You roll 2 3-sided dice
You add the two numbers. What is the probability of getting less than or equal to 4? | |
[1] |
A wheel has 9 sections, each a number on it from 1 to 9. If you spin an even number you win that amount of dollars, if you spin an odd number you lose.
What prize do we expect to get if we spin the wheel? | |
[1] | Flip a coin 10 times.
Each time a head comes up you win $2 and with each tail you lose $2. How much money would you expect to make altogether? | |
[1] |
A Crazy Die has 5 sides, but each side has a different probability of being rolled. This is is the probability distribution of the sides being rolled:
| | 0.5 | | 0.25 | 0.05 | 0.2 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller than or equal to 4? | |
[1] | A group of girls were timed running 100m. Here are the results:
What is the probability of the girls to run 100m in less than 16s?
| |
[2] |
A Crazy Die has 5 sides, but each side has a different probability of being rolled. This is is the probability distribution of the sides being rolled:
| | 0.8 | 0.05 | 0.1 | | 0.05 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a 3? | |
[1] |