Flip a coin 16 times.
Each time a head comes up you win $1 and with each tail you lose $3. How much money would you expect to make altogether? | |
[1] | An obstacle course has 1 Fences and 1 Ditches. You have a 50% 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] |
There are 70 balls in a bag. This is is the probability distribution of their color:
| | 0.1 | | 0.9 | | orange | purple | pink | | Color |
If you choose a random ball from the bag, what is the probability of it not being orange or pink? | |
[1] | We asked a group of girls how many Hot dogs they eat in a month. Here are the results:
What is the probability of the girls to eat exactly 4 Hot dogs in a month? | |
[2] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.3 | 0.7 | | blue | yellow | | Color |
Probability of Type
| | 0.3 | 0.7 | | sedan | wagon | | Type |
What is the probability of a car being a blue sedan? | |
[2] | Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.8 | 0.2 | | red | green | | Color |
Probability of Type
| | 0.6 | 0.4 | | wagon | sedan | | Type |
What is the probability of a car being a green sedan? | |
[2] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting exactly 6? | |
[1] | | You shoot an arrow at a target. There is a 20% chance of scoring a 10 and a 20% chance of scoring a 40 and a 60% chance of scoring a 50. What average score do you expect to get if you do this many times? | |
[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:
| | 0.05 | 0.05 | 0.15 | 0.1 | 0.65 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 4 and smaller than 2? | |
[1] | Roll 48 6-sided dice.
How many times would you expect to get less than 3? | |
[1] |
We asked a group of girls how many Pillows they eat in a day. Here are the results:
What fraction of the girls eat exactly 0 Pillows in a day? | |
[2] | There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.3 | 0.3 | 0.4 | | purple | orange | yellow | | Color |
How many yellow balls were in the bag? | |
[1] |
A group of girls did a math test and here are their scores out of 5:
What is the probability of the girls to score more than 1? | |
[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:
| | 0.15 | 0.15 | 0.2 | 0.05 | 0.45 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller than or equal to 3? | |
[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 | 0.2 | 0.05 | 0.1 | 0.45 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 5 and smaller than 2? | |
[1] |