Flip a coin 18 times.
Each time a head comes up you win $1 and with each tail you lose $2. It costs $6 to play (paid once). How much money would you expect to make altogether? | |
[1] | A group of dogs were timed running 100m. Here are the results:
What is the probability of the dogs to run 100m in less than 14s?
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[2] |
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 2? | |
[2] | Flip 2 coins.
What is the probability of getting a head and a tail? | |
[1] |
An obstacle course has 2 Fences and 1 Ditches. You have a 50% chance of clearing a Fence and a 50% chance of clearing a Ditch.
What is the probability of having a perfect run (clearing everything)? | |
[1] | A wheel has 2 yellow sections and 3 red sections.
What is the probability of getting red? | |
[1] |
You flip a coin and roll a 6 sided die.
What is the probability of getting a number less than 6 and a tail? | |
[1] | There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.4 | 0.3 | 0.3 | | yellow | blue | red | | Color |
How many yellow balls were in the bag? | |
[1] |
Flip a coin 18 times.
Each time a head comes up you win $2 and with each tail you lose $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:
| | 0.2 | 0.1 | 0.05 | 0.2 | 0.45 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 3? | |
[1] |
There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | 0.4 | 0.1 | | purple | green | yellow | | Color |
How many green balls were in the bag? | |
[1] | A bag has 11 balls with numbers from 2 to 12. You take out 1 ball.
What is the probability of NOT getting a ball with a number more than 11? | |
[1] |
A bag has 7 balls with numbers from 5 to 11. You take out 1 ball.
What is the probability of getting a ball with a number more than 6? | |
[1] | Roll 120 6-sided dice.
How many times would you expect to get a number less than 1? | |
[1] |
We asked a group of humans how many Burgers they eat in a month. Here are the results:
What fraction of the humans eat exactly 2 Burgers in a month? | |
[2] | Flip 7 coins.
What is the probability of getting 7 tails? | |
[1] |
There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | 0.2 | 0.3 | | red | green | purple | | Color |
If you choose a random ball from the bag, what is the probability of it being purple or green? | |
[1] |