There are 90 balls in a bag. This is is the probability distribution of their color:
| | 0.7 | 0.1 | 0.2 | | green | yellow | pink | | Color |
How many yellow 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 bigger than 5 and smaller than 4? | |
[1] |
Roll 60 6-sided dice.
How many times would you expect to get a number more than 6? | |
[1] | A bag has 3 balls with numbers from 5 to 7. You take out 1 ball.
What is the probability of NOT getting the ball with the number 5? | |
[1] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.2 | 0.8 | | purple | yellow | | Color |
Probability of Type
| | 1 | | wagon | sedan | | Type |
What is the probability of a car being a purple wagon? | |
[2] | Roll 1 6-sided die.
What is the probability of getting a number smaller than or equal to 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:
What is the probability of rolling a 4? | |
[1] | Roll 72 6-sided dice.
How many times would you expect to get an even number? | |
[1] |
A group of people were timed running 100m. Here are the results:
| Time | people | | 13 | 5 | | 14 | 2 | | 15 | 2 | | 16 | 4 | | 17 | 0 |
What fraction of the people run 100m in less than 16s?
| |
[2] | There are 4 balls in a bag. This is is the probability distribution of their color:
How many pink balls were in the bag? | |
[1] |
Roll 60 6-sided dice.
How many times would you expect to get a number more than 4? | |
[1] | Roll 48 6-sided dice.
How many times would you expect to get more than or equal to 1? | |
[1] |
There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.3 | 0.5 | | yellow | purple | pink | | Color |
How many pink balls were in the bag? | |
[1] | A wheel has 14 sections, each a number on it from 1 to 14. If you spin an even number you win that amount of dollars, if you spin an odd number you lose.
What prize do we expect to get if we spin the wheel? | |
[1] |
A bag has 5 red balls and 5 blue balls. You take out a red ball, then a blue ball, then another ball.
What is the probability of getting blue for the last ball? | |
[1] | A group of humans were timed running 100m. Here are the results:
| Time | humans | | 13 | 2 | | 14 | 0 | | 15 | 3 | | 16 | 6 | | 17 | 0 |
What fraction of the humans run 100m in exactly 15s?
| |
[2] |
| You shoot an arrow at a target. There is a 60% chance of scoring a 10, a 10% chance of scoring a 50, or you might miss completely and score 0. What average score do you expect to get if you do this many times? | |
[1] |