| You shoot an arrow at a target. You will either score 10 (40% chance), 30 (20% chance), or 60. What average score do you expect to get if you do this many times? | |
[1] | You flip a coin and roll a 6 sided die.
What is the probability of getting a number more than 2 and a tail? | |
[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 3 and smaller than 5? | |
[1] | You flip a coin and roll a 6 sided die.
What is the probability of getting a 5 and a head? | |
[1] |
A group of boys did a math test and here are their scores out of 5:
What fraction of the boys score more than 2? | |
[2] | An obstacle course has 1 Fences and 1 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] |
Flip a coin 8 times.
Each time a head comes up you win $4 and with each tail you lose $4. It costs $9 to play (paid once). How much money would you expect to make altogether? | |
[1] | A wheel has 8 pink sections and 5 red sections.
What is the probability of getting red? | |
[1] |
A bag has 12 balls with numbers from 1 to 12. You take out 1 ball.
What is the probability of NOT getting the ball with the number 10? | |
[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 bag has 3 balls with number 5 and 5 balls with a number 6. You take out 1 ball.
What is the probability of getting the ball with the number 5? | |
[1] | Roll 114 6-sided dice.
How many times would you expect to get an even number? | |
[1] |
Flip a coin 16 times.
Each time a Tail comes up you win $3. How much money would you expect to make altogether? | |
[1] | You roll 2 3-sided dice
You add the two numbers. What is the probability of getting exactly 6? | |
[1] |
There are 10 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | 0.2 | 0.3 | | red | pink | orange | | Color |
How many red 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:
What is the probability of rolling a number that is smaller than or equal to 2? | |
[1] |
Roll 144 6-sided dice.
How many times would you expect to get more than or equal to 1? | |
[1] | Flip a coin 2 times.
Each time a Tail comes up you win $1. How much money would you expect to make altogether? | |
[1] |
Flip a coin 4 times.
Each time a Head comes up you win $2. How much money would you expect to make altogether? | |
[1] |