A group of girls did a math test and here are their scores out of 5:
What is the probability of the girls to score more than 5? | |
[2] | A bag has 6 red balls and 8 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 wheel has 12 sections, each a number on it from 1 to 12. 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] | Flip a coin 8 times.
Each time a head comes up you win $1 and with each tail you lose $2. It costs $9 to play (paid once). How much money would you expect to make altogether? | |
[1] |
There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.3 | 0.4 | 0.3 | | yellow | pink | red | | 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:
| | 0.25 | 0.25 | 0.15 | 0.05 | 0.3 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling 1 or 5? | |
[1] |
A group of boys did a math test and here are their scores out of 5:
What fraction of the boys score exactly 2? | |
[2] | Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.7 | 0.3 | | pink | red | | Color |
Probability of Type
| | 0.5 | 0.5 | | sedan | wagon | | Type |
What is the probability of a car being a red sedan? | |
[2] |
Roll 114 6-sided dice.
How many times would you expect to get more than or equal to 3? | |
[1] | A group of boys were timed running 100m. Here are the results:
What fraction of the boys run 100m in exactly 15s?
| |
[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:
| | 0.7 | 0.1 | 0.05 | 0.05 | 0.1 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 4 and smaller than 1? | |
[1] | A group of dogs did a math test and here are their scores out of 5:
What is the probability of the dogs to score less than 1? | |
[2] |
| A bag has 9 balls with number 3 and 9 balls with a number 3. What will be the average of the numbers of the balls taken out of the bag | |
[1] | Roll 126 6-sided dice.
How many times would you expect to get more 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 number that is smaller than or equal to 2? | |
[1] |