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 | 0.1 | 0.25 | 0.55 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number from 1 to 3? | |
[1] | A bag has 8 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 red for the last ball? | |
[1] |
Roll 2 6-sided dice.
You add the two numbers. What is the probability of getting 2? | |
[1] | A group of boys were timed running 100m. Here are the results:
What is the probability of the boys to run 100m in less than 17s?
| |
[2] |
Roll 72 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:
How many orange balls were in the bag? | |
[1] |
Flip 2 coins.
What is the probability of getting 2 tails? | |
[1] | Flip a coin 6 times.
Each time a head comes up you win $3 and with each tail you lose $2. It costs $5 to play (paid once). How much money would you expect to make altogether? | |
[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:
| | 0.55 | 0.25 | | 0.1 | 0.1 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling 4 or 5? | |
[1] | We asked a group of people how many Strawberries they eat in a week. Here are the results:
| Strawberries | people | | 0 | 0 | | 1 | 3 | | 2 | 2 | | 3 | 5 |
What fraction of the people eat exactly 2 Strawberries in a week? | |
[2] |
A bag has 4 balls with numbers from 1 to 4. You take out 1 ball.
What is the probability of getting a ball with an even number? | |
[1] | Roll 24 6-sided dice.
How many times would you expect to get an even number? | |
[1] |
Roll 138 6-sided dice.
How many times would you expect to get an even number? | |
[1] | The weather forecast says that the chances of rain are 70%. The chance of remembering your umbrella is 40%. Your chance of being outside today are 70%.
What is the probability of getting wet today? | |
[1] |
A bag has 7 balls with number 2 and 4 balls with a number 9. You take out 1 ball.
What is the probability of getting the ball with the number 2? | |
[1] | | You shoot an arrow at a target. There is a 40% chance of scoring a 10 and a 20% chance of scoring a 30 and a 40% chance of scoring a 50. 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:
What is the probability of rolling a number that is smaller than 2? | |
[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:
| | 0.35 | | 0.2 | 0.25 | 0.2 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than or equal to 2? | |
[1] |
|