A bag has 3 red balls and 10 blue balls. You take out a red ball, then a blue ball, then another ball.
What is the probability of getting red for the last ball? | |
[1] | An obstacle course has 2 Fences and 1 Ditches. You have a 90% chance of clearing a Fence and a 100% chance of clearing a Ditch.
What is the probability of having a perfect run (clearing everything)? | |
[1] |
Roll 72 6-sided dice.
How many times would you expect to get an ugly number? | |
[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 13s?
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[2] |
Roll 2 6-sided dice.
You add the two numbers. What is the probability of getting 2? | |
[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 number from 2 to 3? | |
[1] |
Roll 30 6-sided dice.
How many times would you expect to get an even number? | |
[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:
| | 0.55 | 0.2 | | 0.2 | 0.05 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a 1? | |
[1] |
Roll 12 6-sided dice.
How many times would you expect to get more than or equal to 2? | |
[1] | There are 90 balls in a bag. This is is the probability distribution of their color:
How many pink 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:
| | 0.15 | 0.2 | 0.15 | 0.2 | 0.3 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller than 1? | |
[1] | The weather forecast says that the chances of rain are 30%. The chance of remembering your umbrella is 40%. Your chance of being outside today are 60%.
What is the probability of getting wet today? | |
[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 number from 1 to 3? | |
[1] | A bag has 3 balls with numbers from 3 to 5. You take out 1 ball.
What is the probability of NOT getting a ball with a number less than 2? | |
[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 16s?
| |
[2] | A bag has 2 red balls, 2 blue balls and 2 yellow balls. You take out a red ball, then a blue ball, then another ball.
What is the probability of getting yellow for the last ball? | |
[1] |
Flip a coin 14 times.
Each time a Tail comes up you win $2. It costs $23 to play (paid once). How much money would you expect to make altogether? | |
[1] | Roll 72 6-sided dice.
How many times would you expect to get less than or equal to 3? | |
[1] |
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