A bag has 4 red balls and 3 blue balls. You take out a red ball, then a blue ball, then another ball.
What is the probability of getting red for the last ball? | |
[1] | A bag has 9 balls with number 3 and 9 balls with a number 1. You take out 1 ball.
What is the probability of getting the ball with the number 1? | |
[1] |
A bag has 5 red balls and 2 blue balls. You take out a blue ball, then a red ball, then another ball.
What is the probability of getting blue for the last ball? | |
[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:
| | 0.6 | 0.2 | 0.15 | | 0.05 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 4 or smaller than 5? | |
[1] |
A bag has 4 balls with numbers from 5 to 8. You take out 1 ball.
What is the probability of getting the ball with the number 6? | |
[1] | A group of boys did a math test and here are their scores out of 5:
What is the probability of the boys to score exactly 3? | |
[2] |
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 | | 0.2 | 0.25 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling 3 or 5? | |
[1] | A bag has 3 red balls and 5 blue balls. You take out a blue ball, then a blue ball, then another ball.
What is the probability of getting blue for the last ball? | |
[1] |
There are 120 balls in a bag. This is is the probability distribution of their color:
How many yellow balls were in the bag? | |
[1] | A bag has 12 balls with numbers from 1 to 12. You take out 1 ball.
What is the probability of NOT getting a ball with a number less than 0? | |
[1] |
A bag has 10 balls with numbers from 2 to 11. You take out 1 ball.
What is the probability of NOT getting a ball with a number less than 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 number that is smaller than 3? | |
[1] |
A wheel has 4 red sections and 5 purple sections.
What is the probability of getting red? | |
[1] | There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | 0.1 | 0.4 | | red | yellow | green | | Color |
How many yellow balls were in the bag? | |
[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] | A bag has 6 red balls, 2 green balls and 10 blue balls. You take out 1 ball.
What is the probability of getting a red ball or a blue ball? | |
[1] |
Roll 18 6-sided dice.
How many times would you expect to get more than or equal to 5? | |
[1] | Flip a coin 16 times.
Each time a head comes up you win $3 and with each tail you lose $3. How much money would you expect to make altogether? | |
[1] |
|