There are 100 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.5 | 0.3 | | blue | purple | orange | | Color |
If you choose a random ball from the bag, what is the probability of it being blue? | |
[1] | An obstacle course has 1 Fences and 2 Ditches. You have a 100% 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] |
A group of people did a math test and here are their scores out of 5:
What fraction of the people score exactly 0? | |
[2] | A bag has 3 balls with numbers from 2 to 4. You take out 1 ball.
What is the probability of NOT getting the ball with the number 4? | |
[1] |
Flip a coin 12 times.
Each time a Tail comes up you win $4. How much money would you expect to make altogether? | |
[1] | A bag has 9 balls with numbers from 4 to 12. You take out 1 ball.
What is the probability of NOT getting the ball with the number 11? | |
[1] |
Roll 78 6-sided dice.
How many times would you expect to get more than or equal to 4? | |
[1] | | You shoot an arrow at a target. There is a 50% chance of scoring a 10 and a 50% chance of scoring a 40. What average score do you expect to get if you do this many times? | |
[1] |
There are 8 balls in a bag. This is is the probability distribution of their color:
How many purple balls were in the bag? | |
[1] | A bag has 7 red balls, 4 blue balls and 9 yellow balls. You take out a yellow ball, then a red ball, then another ball.
What is the probability of getting blue for the last ball? | |
[1] |
Flip a coin 8 times.
How many times would you expect to get Heads? | |
[1] | Roll 4 6-sided dice.
What is the probability of getting 4 numbers that are less than 3? | |
[1] |
Roll 4 6-sided dice.
What is the probability of getting 4 numbers that are 1 or 4? | |
[1] | A group of girls were timed running 100m. Here are the results:
What is the probability of the girls to run 100m in exactly 14s?
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[2] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 1 | | | pink | purple | | Color |
Probability of Type
| | 0.7 | 0.3 | | wagon | sedan | | Type |
What is the probability of a car being a purple wagon? | |
[2] | An obstacle course has 1 Fences and 2 Ditches. You have a 90% 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] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting less than or equal to 3? | |
[1] |