A wheel has 14 sections, each a number on it from 1 to 14. 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 4 6-sided dice.
What is the probability of getting 4 numbers that are even? | |
[1] |
A group of people did a math test and here are their scores out of 5:
What is the probability of the people to score less than 1? | |
[2] | A group of girls were timed running 100m. Here are the results:
What fraction of the girls run 100m in exactly 13s?
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[2] |
There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.1 | 0.3 | 0.6 | | pink | red | yellow | | Color |
If you choose a random ball from the bag, what is the probability of it being pink or yellow? | |
[1] | We asked a group of girls how many Burgers they eat in a day. Here are the results:
What is the probability of the girls to eat exactly 4 Burgers in a day? | |
[2] |
The weather forecast says that the chances of rain are 50%. The chance of remembering your umbrella is 60%. Your chance of being outside today are 90%.
What is the probability of getting wet today? | |
[1] | Roll 2 6-sided dice.
What is the probability of getting a 2 on both dice? | |
[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:
| | 0.5 | 0.25 | | 0.15 | 0.1 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 2? | |
[1] | Flip a coin 4 times.
Each time a head comes up you win $2 and with each tail you lose $2. It costs $8 to play (paid once). How much money would you expect to make altogether? | |
[1] |
There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.1 | 0.7 | | pink | green | yellow | | Color |
How many pink balls were in the bag? | |
[1] | Roll 6 6-sided dice.
How many times would you expect to get an even number? | |
[1] |
Flip a coin 14 times.
Each time a head comes up you win $1 and with each tail you lose $4. It costs $18 to play (paid once). How much money would you expect to make altogether? | |
[1] | A group of girls were timed running 100m. Here are the results:
What fraction of the girls run 100m in exactly 17s?
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[2] |
A group of kids were timed running 100m. Here are the results:
What is the probability of the kids to run 100m in more than 15s?
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[2] |