Flip a coin 14 times.
Each time a head comes up you win $1 and with each tail you lose $4. It costs $26 to play (paid once). How much money would you expect to make altogether? | |
[1] | We asked a group of girls how many Strawberries they eat in a day. Here are the results:
What fraction of the girls eat exactly 4 Strawberries in a day? | |
[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:
| | 0.65 | 0.05 | | 0.15 | 0.15 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 5 and smaller than 1? | |
[1] | We asked a group of dogs how many Chocolates they eat in a month. Here are the results:
What is the probability of the dogs to eat more than 4 Chocolates in a month? | |
[2] |
There are 16 balls in a bag. This is is the probability distribution of their color:
How many pink 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:
| | 0.55 | 0.15 | 0.15 | | 0.15 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller than or equal to 4? | |
[1] |
A bag has 4 balls with number 6 and 2 balls with a number 7. You take out 1 ball.
What is the probability of getting the ball with the number 7? | |
[1] | There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.8 | | 0.2 | | green | pink | purple | | Color |
How many pink balls were in the bag? | |
[1] |
There are 100 balls in a bag. This is is the probability distribution of their color:
| | 0.4 | 0.2 | 0.4 | | green | purple | yellow | | Color |
If you choose a random ball from the bag, what is the probability of it not being purple? | |
[1] | Roll 132 6-sided dice.
How many times would you expect to get less than 2? | |
[1] |
The chances of feeling like icecream are 90%. The chances of being near an icecream store are 70%. There is a 20% chance that you lost all your money.
What is the probability of having icecream? | |
[1] | A group of people did a math test and here are their scores out of 5:
What fraction of the people score less than 4? | |
[2] |
Flip 2 coins.
What is the probability of getting a head and a tail? | |
[1] | Flip a coin 14 times.
Each time a head comes up you win $1 and with each tail you lose $3. It costs $18 to play (paid once). How much money would you expect to make altogether? | |
[1] |
An obstacle course has 2 Fences and 1 Ditches. You have a 80% chance of clearing a Fence and a 90% chance of clearing a Ditch.
What is the probability of having a perfect run (clearing everything)? | |
[1] | Roll 1 6-sided die.
What is the probability of NOT getting a 3? | |
[1] |
The weather forecast says that the chances of rain are 20%. Your chance of being outside today is 70%. The chance of remembering your umbrella is 60%.
What is the probability of getting wet today? | |
[1] |