Flip a coin 8 times.
Each time a head comes up you win $3 and with each tail you lose $3. How much money would you expect to make altogether? | |
[1] | A group of boys did a math test and here are their scores out of 5:
What fraction of the boys score exactly 5? | |
[2] |
Flip a coin 10 times.
Each time a Tail comes up you win $3. It costs $13 to play (paid once). How much money would you expect to make altogether? | |
[1] | A group of girls did a math test and here are their scores out of 5:
What fraction of the girls score exactly 2? | |
[2] |
| You shoot an arrow at a target. There is a 40% chance of scoring a 10 and a 20% chance of scoring a 30 and a 40% chance of scoring a 60. 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:
| | 0.25 | 0.25 | 0.1 | 0.25 | 0.15 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than or equal to 4? | |
[1] |
An obstacle course has 2 Fences and 1 Ditches. You have a 80% 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] | Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.2 | 0.8 | | red | pink | | Color |
Probability of Type
| | 0.3 | 0.7 | | wagon | sedan | | Type |
What is the probability of a car being a red sedan? | |
[2] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.3 | 0.7 | | red | pink | | Color |
Probability of Type
| | 1 | | | sedan | wagon | | Type |
What is the probability of a car being a pink wagon? | |
[2] | A group of people were timed running 100m. Here are the results:
What fraction of the people run 100m in more than 15s?
| |
[2] |
A group of girls did a math test and here are their scores out of 5:
What fraction of the girls score more than 4? | |
[2] | A wheel has 2 orange sections and 5 red sections.
What is the probability of getting red? | |
[1] |
A group of people were timed running 100m. Here are the results:
| Time | people | | 13 | 3 | | 14 | 0 | | 15 | 6 | | 16 | 3 | | 17 | 5 |
What is the probability of the people to run 100m in exactly 13s?
| |
[2] |