A bag has 9 red balls, 4 blue balls and 7 yellow balls. You take out a yellow ball, then a yellow ball, then another ball.
What is the probability of getting red for the last ball? | |
[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:
What is the probability of rolling a 2? | |
[1] |
A bag has 8 red balls and 4 blue balls. You take out a blue ball, then a red ball, then another ball.
What is the probability of getting red for the last ball? | |
[1] | A group of girls were timed running 100m. Here are the results:
What fraction of the girls run 100m in exactly 14s?
| |
[2] |
Roll 54 6-sided dice.
How many times would you expect to get less than or equal to 4? | |
[1] | The weather forecast says that the chances of rain are 90%. Your chance of being outside today is 50%. The chance of remembering your umbrella is 40%.
What is the probability of getting wet today? | |
[1] |
A group of dogs did a math test and here are their scores out of 5:
What is the probability of the dogs to score less than 0? | |
[2] | | You shoot an arrow at a target. There is a 40% chance of scoring a 20 and a 30% chance of scoring a 30 and a 30% chance of scoring a 50. What average score do you expect to get if you do this many times? | |
[1] |
A group of girls were timed running 100m. Here are the results:
What is the probability of the girls to run 100m in exactly 17s?
| |
[2] | A bag has 8 balls with numbers from 5 to 12. You take out 1 ball.
What is the probability of NOT getting a ball with a number more than 7? | |
[1] |
Roll 150 6-sided dice.
How many times would you expect to get less than 1? | |
[1] | Roll 126 6-sided dice.
How many times would you expect to get less than 4? | |
[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:
| | 0.4 | 0.05 | 0.15 | 0.25 | 0.15 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller than 4? | |
[1] | Cars go by on a road, each is a different color and type.
Probability of Color
| | 1 | | | purple | orange | | Color |
Probability of Type
| | 0.2 | 0.8 | | wagon | sedan | | Type |
What is the probability of a car being a orange sedan? | |
[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:
| | 0.1 | 0.05 | 0.25 | | 0.6 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number from 4 to 5? | |
[1] | You flip a coin and roll a 4 sided die.
What is the probability of getting a 2 and a head? | |
[1] |
|