An obstacle course has 2 Fences and 1 Ditches. You have a 50% chance of clearing a Fence and a 90% chance of clearing a Ditch.
What is the probability of having a perfect run (clearing everything)? | |
[1] | Flip 2 coins.
What is the probability of getting 2 heads? | |
[1] |
Roll 72 6-sided dice.
How many times would you expect to get less than 6? | |
[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 1? | |
[1] |
Flip a coin 8 times.
Each time a Tail comes up you win $4. It costs $11 to play (paid once). How much money would you expect to make altogether? | |
[1] | A bag has 2 balls with numbers from 2 to 3. You take out 1 ball.
What is the probability of NOT getting the ball with the number 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:
| | 0.05 | | 0.05 | 0.25 | 0.65 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 1? | |
[1] | There are 50 balls in a bag. This is is the probability distribution of their color:
| | 0.6 | | 0.4 | | green | pink | purple | | Color |
How many pink balls were in the bag? | |
[1] |
| You shoot an arrow at a target. There is a 70% chance of scoring a 20 and a 30% chance of scoring a 40. What average score do you expect to get if you do this many times? | |
[1] | Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.5 | 0.5 | | yellow | blue | | Color |
Probability of Type
| | 0.7 | 0.3 | | sedan | wagon | | Type |
What is the probability of a car being a blue sedan? | |
[2] |
There are 10 balls in a bag. This is is the probability distribution of their color:
How many red balls were in the bag? | |
[1] | The weather forecast says that the chances of rain are 20%. Your chance of being outside today is 50%. You flip a coin to decide whether to take your umbrella.
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 or equal to 2? | |
[1] | A group of boys did a math test and here are their scores out of 5:
What is the probability of the boys to score exactly 0? | |
[2] |
A bag has 4 balls with numbers from 2 to 5. You take out 1 ball.
What is the probability of getting the ball with the number 6? | |
[1] | Roll 1 6-sided die.
What is the probability of getting an even number? | |
[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:
| | 0.5 | 0.1 | 0.25 | 0.15 | | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 3 and smaller than 4? | |
[1] | A bag has 3 balls with number 7 and 3 balls with a number 2. You take out 1 ball.
What is the probability of getting the ball with the number 7? | |
[1] |
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