Flip a coin 2 times.
Each time a Tail comes up you win $3. How much money would you expect to make altogether? | |
[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 | 0.1 | 0.15 | 0.25 | 0.2 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a 2? | |
[1] |
There are 10 balls in a bag. This is is the probability distribution of their color:
| | 0.7 | 0.1 | 0.2 | | red | pink | blue | | Color |
If you choose a random ball from the bag, what is the probability of it being red or pink? | |
[1] | We asked a group of boys how many Chocolates they eat in a month. Here are the results:
What fraction of the boys eat less than 0 Chocolates in a month? | |
[2] |
You flip a coin and roll a 4 sided die.
What is the probability of getting a 5 and a head? | |
[1] | There are 44 balls in a bag. This is is the probability distribution of their color:
How many red balls were in the bag? | |
[1] |
Roll 1 6-sided die.
What is the probability of getting a number bigger than 2? | |
[1] | We asked a group of girls how many Pizzas they eat in a day. Here are the results:
What is the probability of the girls to eat exactly 0 Pizzas in a day? | |
[2] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting less than or equal to 4? | |
[1] | The weather forecast says that the chances of rain are 60%. Your chance of being outside today is 80%. The chance of remembering your umbrella is 40%.
What is the probability of getting wet today? | |
[1] |
A group of kids were timed running 100m. Here are the results:
What fraction of the kids run 100m in exactly 13s?
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[2] | There are 50 balls in a bag. This is is the probability distribution of their color:
| | 0.3 | 0.1 | 0.6 | | green | red | blue | | Color |
If you choose a random ball from the bag, what is the probability of it being red or green? | |
[1] |
A bag has 8 balls with numbers from 5 to 12. You take out 1 ball.
What is the probability of NOT getting a ball with a number more than 6? | |
[1] | A bag has 3 red balls, 2 blue balls and 10 yellow balls. You take out a yellow ball, then a red ball, then another ball.
What is the probability of getting yellow for the last ball? | |
[1] |
An obstacle course has 1 Fences and 2 Ditches. You have a 90% chance of clearing a Fence and a 80% chance of clearing a Ditch.
What is the probability of having a perfect run (clearing everything)? | |
[1] | The weather forecast says that the chances of rain are 40%. Your chance of being outside today is 70%. The chance of remembering your umbrella is 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:
What is the probability of rolling a number that is bigger than 2 or smaller than 4? | |
[1] |