There are 30 balls in a bag. This is is the probability distribution of their color:
| | 0.4 | 0.4 | 0.2 | | blue | purple | orange | | Color |
How many orange balls were in the bag? | |
[1] | You flip a coin and roll a 6 sided die.
What is the probability of getting a 6 and a tail? | |
[1] |
The weather forecast says that the chances of rain are 50%. Your chance of being outside today is 70%. The chance of remembering your umbrella is 70%.
What is the probability of getting wet today? | |
[1] | A group of humans did a math test and here are their scores out of 5:
What fraction of the humans score less than 0? | |
[2] |
Roll 2 6-sided dice.
What is the probability of getting a 3 on both dice? | |
[1] | You roll a 3 sided die and a 4 sided die.
What is the probability of getting 3 on both dice? | |
[1] |
The weather forecast says that the chances of rain are 30%. The chance of remembering your umbrella is 70%. Your chance of being outside today are 40%.
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:
| | 0.2 | 0.1 | 0.05 | 0.25 | 0.4 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than or equal to 3? | |
[1] |
We asked a group of boys how many Sandwiches they eat in a week. Here are the results:
What is the probability of the boys to eat more than 0 Sandwiches in a week? | |
[2] | There are 36 balls in a bag. This is is the probability distribution of their color:
How many blue balls were in the bag? | |
[1] |
A wheel has 11 sections, each a number on it from 1 to 11. 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] | A group of kids were timed running 100m. Here are the results:
What is the probability of the kids to run 100m in exactly 14s?
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[2] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.8 | 0.2 | | purple | pink | | Color |
Probability of Type
| | 0.3 | 0.7 | | sedan | wagon | | Type |
What is the probability of a car being a pink wagon? | |
[2] | | You shoot an arrow at a target. There is a 20% chance of scoring a 20 and a 40% chance of scoring a 30 and a 40% chance of scoring a 60. What average score do you expect to get if you do this many times? | |
[1] |
An obstacle course has 1 Fences and 1 Ditches. You have a 80% 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] | Flip a coin 2 times.
Each time a Tail comes up you win $4. It costs $4 to play (paid once). How much money would you expect to make altogether? | |
[1] |
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