A wheel has 6 sections, each has a reward in dollars, from $1 through to $6.
What prize do we expect to get if we spin the wheel? | |
[1] | A bag has 6 red balls, 7 green balls and 5 blue balls. You take out 1 ball.
What is the probability of getting a red ball? | |
[1] |
Roll 2 6-sided dice.
What is the probability of getting a 3 on both dice? | |
[1] | Roll 2 6-sided dice.
What is the probability of getting 2 numbers that are less than 3? | |
[1] |
Flip a coin 18 times.
Each time a Tail comes up you win $2. It costs $28 to play (paid once). How much money would you expect to make altogether? | |
[1] | Roll 12 6-sided dice.
How many times would you expect to get an even number? | |
[1] |
There are 70 balls in a bag. This is is the probability distribution of their color:
| | 0.1 | 0.1 | 0.8 | | purple | pink | green | | Color |
If you choose a random ball from the bag, what is the probability of it being purple or pink? | |
[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 4 or smaller than 5? | |
[1] |
A group of boys were timed running 100m. Here are the results:
What fraction of the boys run 100m in exactly 16s?
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[2] | The weather forecast says that the chances of rain are 50%. Your chance of being outside today is 40%. The chance of remembering your umbrella is 60%.
What is the probability of getting wet today? | |
[1] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.4 | 0.6 | | blue | orange | | Color |
Probability of Type
| | 0.5 | 0.5 | | sedan | wagon | | Type |
What is the probability of a car being a orange sedan? | |
[2] | You roll 2 3-sided dice
You add the two numbers. What is the probability of getting less than 5? | |
[1] |
There are 16 balls in a bag. This is is the probability distribution of their color:
How many orange balls were in the bag? | |
[1] | A group of humans did a math test and here are their scores out of 5:
What is the probability of the humans to score less than 5? | |
[2] |
There are 10 balls in a bag. This is is the probability distribution of their color:
How many blue balls were in the bag? | |
[1] | The chances of feeling like icecream are 80%. The chances of being near an icecream store are 40%. There is a 10% chance that you lost all your money.
What is the probability of having icecream? | |
[1] |
There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.6 | | 0.4 | | orange | yellow | red | | Color |
If you choose a random ball from the bag, what is the probability of it not being yellow? | |
[1] |