Roll 90 6-sided dice.
How many times would you expect to get a number less than 2? | |
[1] | A group of people were timed running 100m. Here are the results:
people
| | 3 | 6 | 6 | 2 | 2 | | 13 | 14 | 15 | 16 | 17 | | Time |
What fraction of the people run 100m in exactly 16s?
| |
[2] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting more than or equal to 5? | |
[1] | There are 44 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 50%. Your chance of being outside today is 70%. The chance of remembering your umbrella is 40%.
What is the probability of getting wet today? | |
[1] | There are 70 balls in a bag. This is is the probability distribution of their color:
| | 0.1 | 0.5 | 0.4 | | blue | orange | purple | | Color |
How many blue balls were in the bag? | |
[1] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting more than 5? | |
[1] | Roll 24 6-sided dice.
How many times would you expect to get anything except 1? | |
[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 4 red balls and 4 blue balls. You take out a red ball, then a red ball, then another ball.
What is the probability of getting blue for the last ball? | |
[1] |
A bag has 5 red balls, 4 green balls and 3 blue balls. You take out 1 ball.
What is the probability of NOT getting a green ball? | |
[1] | | You shoot an arrow at a target. There is a 50% chance of scoring a 20 and a 50% chance of scoring a 60. What average score do you expect to get if you do this many times? | |
[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:
| | 0.25 | 0.2 | 0.1 | 0.25 | 0.2 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 3 and smaller than 5? | |
[1] | | You shoot an arrow at a target. There is a 60% chance of scoring a 10, a 30% 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] |
Roll 1 6-sided die.
What is the probability of getting a 1? | |
[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:
| | 0.15 | 0.05 | 0.2 | | 0.6 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller than or equal to 1? | |
[1] |
A group of humans were timed running 100m. Here are the results:
What fraction of the humans run 100m in exactly 15s?
| |
[2] |