| A bag has 4 balls with number 9 and 6 balls with a number 5. What will be the average of the numbers of the balls taken out of the bag | |
[1] | There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.4 | 0.4 | 0.2 | | red | yellow | green | | Color |
If you choose a random ball from the bag, what is the probability of it being red or yellow? | |
[1] |
A group of girls did a math test and here are their scores out of 5:
What fraction of the girls score exactly 1? | |
[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:
| | 0.1 | 0.25 | 0.25 | 0.4 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 4 and smaller than 5? | |
[1] |
A group of kids were timed running 100m. Here are the results:
What is the probability of the kids to run 100m in less than 17s?
| |
[2] | A group of girls were timed running 100m. Here are the results:
What fraction of the girls run 100m in exactly 16s?
| |
[2] |
| You shoot an arrow at a target. There is a 30% chance of scoring a 10 and a 20% chance of scoring a 40 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:
| | 0.5 | 0.05 | 0.25 | 0.2 | | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling 1 or 3? | |
[1] |
Flip a coin 2 times.
Each time a head comes up you win $1 and with each tail you lose $3. It costs $2 to play (paid once). How much money would you expect to make altogether? | |
[1] | A group of people were timed running 100m. Here are the results:
| Time | people | | 13 | 1 | | 14 | 6 | | 15 | 3 | | 16 | 0 | | 17 | 2 |
What fraction of the people run 100m in more than 15s?
| |
[2] |
There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.4 | 0.2 | 0.4 | | blue | pink | purple | | Color |
If you choose a random ball from the bag, what is the probability of it not being pink or blue? | |
[1] | There are 10 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.5 | 0.3 | | orange | yellow | purple | | Color |
How many purple balls were in the bag? | |
[1] |
There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.7 | | 0.3 | | yellow | purple | green | | Color |
If you choose a random ball from the bag, what is the probability of it not being green or yellow? | |
[1] | Roll 132 6-sided dice.
How many times would you expect to get more than or equal to 5? | |
[1] |
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 exactly 1? | |
[2] |