There are 15 balls in a bag. This is is the probability distribution of their color:
How many red balls were in the bag? | |
[1] | Roll 4 6-sided dice.
What is the probability of getting 4 numbers that are more than 3? | |
[1] |
You flip a coin and roll a 3 sided die.
What is the probability of getting a 2 and a head? | |
[1] | A bag has 5 red balls and 10 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] |
You flip a coin and roll a 10 sided die.
What is the probability of getting a 2 and a head? | |
[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 and smaller than 2? | |
[1] |
A bag has 7 red balls, 5 blue balls and 3 yellow balls. You take out a yellow ball, then a yellow ball, then another ball.
What is the probability of getting yellow for the last ball? | |
[1] | A bag has 2 balls with number 1 and 4 balls with a number 1. You take out 1 ball.
What is the probability of getting the ball with the number 1? | |
[1] |
| You shoot an arrow at a target. There is a 80% chance of scoring a 20 and a 20% chance of scoring a 40. What average score do you expect to get if you do this many times? | |
[1] | There are 120 balls in a bag. This is is the probability distribution of their color:
How many purple balls were in the bag? | |
[1] |
There are 10 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | 0.1 | 0.4 | | pink | purple | green | | Color |
How many pink balls were in the bag? | |
[1] | A bag has 10 red balls, 6 blue balls and 5 yellow 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] |
Roll 1 6-sided die.
What is the probability of getting an even number? | |
[1] | A group of humans were timed running 100m. Here are the results:
humans
| |
| Time | 13 | 3 | | 14 | 6 | | 15 | 2 | | 16 | 4 | | 17 | 6 |
What fraction of the humans run 100m in more than 17s?
| |
[2] |
Roll 36 6-sided dice.
How many times would you expect to get more than 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:
| | 0.1 | 0.15 | 0.05 | 0.05 | 0.65 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 1 or smaller than 4? | |
[1] |
A bag has 3 balls with numbers from 4 to 6. You take out 1 ball.
What is the probability of getting the ball with the number 6? | |
[1] | Roll 2 6-sided dice.
What is the probability of getting 2 numbers that are less than 5? | |
[1] |
There are 24 balls in a bag. This is is the probability distribution of their color:
How many pink balls were in the bag? | |
[1] |