| You shoot an arrow at a target. There is a 70% chance of scoring a 10 and a 30% chance of scoring a 50. What average score do you expect to get if you do this many times? | |
[1] | A bag has 8 balls with numbers from 3 to 10. You take out 1 ball.
What is the probability of NOT getting a ball with a number more than 3? | |
[1] |
There are 40 balls in a bag. This is is the probability distribution of their color:
How many blue balls were in the bag? | |
[1] | Flip a coin 2 times.
Each time a head comes up you win $1 and with each tail you lose $1. It costs $2 to play (paid once). How much money would you expect to make altogether? | |
[1] |
Flip a coin 14 times.
Each time a Tail comes up you win $3. 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:
| | 0.15 | 0.2 | 0.2 | 0.2 | 0.25 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 2 or smaller than 4? | |
[1] |
Flip a coin 16 times.
Each time a head comes up you win $2 and with each tail you lose $4. It costs $22 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:
What is the probability of rolling a number that is bigger than 1 or smaller than 3? | |
[1] |
A group of kids did a math test and here are their scores out of 5:
What is the probability of the kids to score less than 5? | |
[2] | There are 25 balls in a bag. This is is the probability distribution of their color:
How many orange 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:
What is the probability of rolling 2 or 4? | |
[1] | Flip a coin 12 times.
Each time a head comes up you win $4 and with each tail you lose $2. It costs $15 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:
| | 0.7 | 0.1 | 0.2 | | pink | green | orange | | Color |
If you choose a random ball from the bag, what is the probability of it being orange or pink? | |
[1] | A group of humans were timed running 100m. Here are the results:
| Time | humans | | 13 | 1 | | 14 | 0 | | 15 | 6 | | 16 | 1 | | 17 | 2 |
What is the probability of the humans to run 100m in exactly 16s?
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[2] |
You flip a coin and roll a 6 sided die.
What is the probability of getting a 6 and a head? | |
[1] | There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.3 | 0.3 | 0.4 | | pink | red | blue | | Color |
How many pink balls were in the bag? | |
[1] |
There are 12 balls in a bag. This is is the probability distribution of their color:
How many blue balls were in the bag? | |
[1] | A wheel has 5 purple sections and 4 blue sections.
What is the probability of getting blue? | |
[1] |
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