There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.6 | 0.3 | 0.1 | | red | pink | purple | | Color |
How many pink balls were in the bag? | |
[1] | There are 80 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | | 0.5 | | green | orange | pink | | Color |
How many green balls were in the bag? | |
[1] |
A bag has 2 balls with numbers from 3 to 4. You take out 1 ball.
What is the probability of NOT getting a ball with a number less than 4? | |
[1] | A group of people were timed running 100m. Here are the results:
| Time | people | | 13 | 2 | | 14 | 4 | | 15 | 0 | | 16 | 1 | | 17 | 0 |
What is the probability of the people to run 100m in less than 17s?
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[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:
| | 0.15 | 0.25 | | 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 1? | |
[1] | A group of kids were timed running 100m. Here are the results:
What fraction of the kids run 100m in exactly 15s?
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[2] |
Roll 1 6-sided die.
What is the probability of NOT getting a 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 a number that is bigger than or equal to 2? | |
[1] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.5 | 0.5 | | orange | yellow | | Color |
Probability of Type
| | 0.7 | 0.3 | | wagon | sedan | | Type |
What is the probability of a car being a yellow wagon? | |
[2] | We asked a group of dogs how many Icecreams they eat in a month. Here are the results:
What fraction of the dogs eat exactly 1 Icecreams in a month? | |
[2] |
Roll a die 66 times.
How many times would you expect to get a 5? | |
[1] | You roll a 4 sided die and a 8 sided die.
What is the probability of getting 3 on both dice? | |
[1] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.9 | 0.1 | | yellow | green | | Color |
Probability of Type
| | 0.1 | 0.9 | | wagon | sedan | | Type |
What is the probability of a car being a green sedan? | |
[2] | | You shoot an arrow at a target. There is a 20% chance of scoring a 20 and a 20% chance of scoring a 40 and a 60% chance of scoring a 50. What average score do you expect to get if you do this many times? | |
[1] |
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] |