There are 90 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | 0.2 | 0.3 | | red | pink | yellow | | Color |
How many yellow balls were in the bag? | |
[1] | A bag has 3 red balls, 4 blue balls and 9 yellow balls. You take out a blue ball, then a blue ball, then another ball.
What is the probability of getting red for the last ball? | |
[1] |
Flip 2 coins.
What is the probability of getting 2 tails? | |
[1] | A bag has 4 red balls, 5 green balls and 8 blue balls. You take out 1 ball.
What is the probability of getting a blue ball? | |
[1] |
Roll 114 6-sided dice.
How many times would you expect to get more than or equal to 2? | |
[1] | A group of kids were timed running 100m. Here are the results:
What is the probability of the kids to run 100m in exactly 15s?
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[2] |
There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.2 | 0.6 | | purple | pink | green | | Color |
How many pink balls were in the bag? | |
[1] | A group of people were timed running 100m. Here are the results:
What fraction of the people run 100m in exactly 17s?
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[2] |
A bag has 3 balls with number 3 and 6 balls with a number 9. You take out 1 ball.
What is the probability of getting the ball with the number 3? | |
[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 3 or 4? | |
[1] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting more 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:
What is the probability of rolling a 2? | |
[1] |
A bag has 2 red balls, 9 blue balls and 3 yellow balls. You take out a yellow ball, then a blue 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:
| | 0.3 | 0.25 | 0.25 | | 0.2 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 5 and smaller than 1? | |
[1] |
There are 100 balls in a bag. This is is the probability distribution of their color:
| | 0.1 | | 0.9 | | red | green | purple | | Color |
How many red balls were in the bag? | |
[1] | There are 30 balls in a bag. This is is the probability distribution of their color:
| | 0.6 | 0.3 | 0.1 | | yellow | red | green | | Color |
If you choose a random ball from the bag, what is the probability of it not being green? | |
[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:
| | 0.25 | | 0.15 | 0.1 | 0.5 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller 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 3? | |
[1] |
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