There are 70 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.8 | | blue | pink | yellow | | Color |
How many blue 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:
| | 0.4 | 0.25 | 0.15 | 0.1 | 0.1 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than or equal to 1? | |
[1] |
There are 90 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | 0.3 | 0.2 | | pink | orange | purple | | Color |
If you choose a random ball from the bag, what is the probability of it not being purple or orange? | |
[1] | | A bag has 8 balls with number 4 and 7 balls with a number 9. What will be the average of the numbers of the balls taken out of the bag | |
[1] |
Flip a coin 18 times.
Each time a Head comes up you win $4. It costs $26 to play (paid once). How much money would you expect to make altogether? | |
[1] | There are 90 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.5 | 0.3 | | yellow | blue | orange | | Color |
How many blue 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 more than 15s?
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[2] | A bag has 2 balls with numbers from 4 to 5. You take out 1 ball.
What is the probability of getting the ball with the number 5? | |
[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 that is bigger than 5 and smaller than 4? | |
[1] | You roll 2 3-sided dice
You add the two numbers. What is the probability of getting more than 2? | |
[1] |
A wheel has 13 sections, each a number on it from 1 to 13. If you spin an odd number you win that amount of dollars, if you spin an even number you lose.
What prize do we expect to get if we spin the wheel? | |
[1] | Roll a die 24 times.
How many times would you expect to get a 2? | |
[1] |
A group of people were timed running 100m. Here are the results:
What fraction of the people run 100m in exactly 15s?
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[2] | A wheel has 9 sections, each a number on it from 1 to 9. If you spin an odd number you win that amount of dollars, if you spin an even number you lose.
What prize do we expect to get if we spin the wheel? | |
[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] | Roll 1 6-sided die.
What is the probability of getting a 2? | |
[1] |
There are 90 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.3 | 0.5 | | purple | blue | green | | Color |
If you choose a random ball from the bag, what is the probability of it being green or purple? | |
[1] | An obstacle course has 2 Fences and 1 Ditches. You have a 100% chance of clearing a Fence and a 80% chance of clearing a Ditch.
What is the probability of having a perfect run (clearing everything)? | |
[1] |
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