An obstacle course has 2 Fences and 1 Ditches. You have a 50% chance of clearing a Fence and a 50% chance of clearing a Ditch.
What is the probability of having a perfect run (clearing everything)? | |
[1] | A bag has 3 red balls and 6 blue balls. You take out a blue ball, then a blue ball, then another ball.
What is the probability of getting blue for the last ball? | |
[1] |
Roll 108 6-sided dice.
How many times would you expect to get more than or equal to 2? | |
[1] | | You shoot an arrow at a target. There is a 20% chance of scoring a 20 and a 30% chance of scoring a 30 and a 50% chance of scoring a 60. What average score do you expect to get if you do this many times? | |
[1] |
We asked a group of girls how many Pillows they eat in a week. Here are the results:
What is the probability of the girls to eat exactly 0 Pillows in a week? | |
[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:
| | 0.05 | 0.15 | 0.05 | 0.05 | 0.7 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a 2? | |
[1] |
There are 80 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | 0.5 | | | yellow | blue | green | | Color |
If you choose a random ball from the bag, what is the probability of it being blue? | |
[1] | Roll 24 6-sided dice.
How many times would you expect to get more than or equal to 5? | |
[1] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting less than 2? | |
[1] | Flip a coin 8 times.
Each time a Tail comes up you win $3. It costs $10 to play (paid once). How much money would you expect to make altogether? | |
[1] |
Roll 108 6-sided dice.
How many times would you expect to get more than 2? | |
[1] | There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.1 | 0.1 | 0.8 | | yellow | purple | green | | Color |
If you choose a random ball from the bag, what is the probability of it being yellow? | |
[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 | 0.15 | 0.15 | 0.65 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number from 3 to 5? | |
[1] | There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.1 | | 0.9 | | purple | red | green | | Color |
If you choose a random ball from the bag, what is the probability of it being red or green? | |
[1] |
A group of people did a math test and here are their scores out of 5:
What fraction of the people score less than 1? | |
[2] | Roll 4 6-sided dice.
What is the probability of getting 4 numbers that are 1 or 4? | |
[1] |
There are 100 balls in a bag. This is is the probability distribution of their color:
If you choose a random ball from the bag, what is the probability of it not being orange or red? | |
[1] | | You shoot an arrow at a target. You will either score 20 (10% chance), 30 (20% chance), or 60. What average score do you expect to get if you do this many times? | |
[1] |
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