Flip a coin 2 times.
Each time a Tail comes up you win $3. It costs $3 to play (paid once). How much money would you expect to make altogether? | |
[1] | There are 80 balls in a bag. This is is the probability distribution of their color:
| | 0.3 | 0.5 | 0.2 | | red | orange | pink | | Color |
How many pink balls were in the bag? | |
[1] |
You flip a coin and roll a 6 sided die.
What is the probability of getting a 4 or a 2 and a head or a tail? | |
[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 | 0.2 | 0.15 | 0.15 | 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] |
There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.1 | 0.5 | 0.4 | | orange | purple | green | | Color |
How many purple balls were in the bag? | |
[1] | A group of dogs were timed running 100m. Here are the results:
What is the probability of the dogs to run 100m in exactly 17s?
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[2] |
The chances of feeling like icecream are 80%. The chances of being near an icecream store are 80%. There is a 30% chance that you lost all your money.
What is the probability of having icecream? | |
[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 smaller than 4? | |
[1] |
Flip 3 coins.
What is the probability of getting 3 tails? | |
[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 or equal to 1? | |
[1] |
A bag has 5 red balls and 8 blue balls. You take out a blue ball, then a blue ball, then another ball.
What is the probability of getting blue 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 number that is bigger than 4 and smaller than 5? | |
[1] |
You flip a coin and roll a 5 sided die.
What is the probability of getting a 1 and a tail? | |
[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 bag has 2 red balls, 2 blue balls and 5 yellow balls. You take out a yellow ball, then a blue ball, then another ball.
What is the probability of getting yellow for the last ball? | |
[1] | A group of people were timed running 100m. Here are the results:
| Time | people | | 13 | 1 | | 14 | 3 | | 15 | 0 | | 16 | 4 | | 17 | 3 |
What fraction of the people run 100m in more than 15s?
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[2] |
Flip a coin 16 times.
Each time a head comes up you win $3 and with each tail you lose $3. How much money would you expect to make altogether? | |
[1] | Roll 108 6-sided dice.
How many times would you expect to get anything except 1? | |
[1] |
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