Flip a coin 8 times.
Each time a Head comes up you win $4. It costs $9 to play (paid once). How much money would you expect to make altogether? | |
[1] | There are 10 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.5 | 0.3 | | orange | pink | yellow | | Color |
If you choose a random ball from the bag, what is the probability of it not being orange? | |
[1] |
Flip a coin 14 times.
Each time a Tail comes up you win $1. It costs $23 to play (paid once). How much money would you expect to make altogether? | |
[1] | Roll 48 6-sided dice.
How many times would you expect to get an ugly number? | |
[1] |
A bag has 6 red balls, 7 green balls and 2 blue balls. You take out 1 ball.
What is the probability of NOT getting a green ball? | |
[1] | Flip a coin 18 times.
Each time a Tail comes up you win $2. It costs $24 to play (paid once). How much money would you expect to make altogether? | |
[1] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting more than or equal to 6? | |
[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 more than 1? | |
[2] |
| You shoot an arrow at a target. There is a 90% chance of scoring a 20 and a 10% chance of scoring a 60. What average score do you expect to get if you do this many times? | |
[1] | The chances of feeling like icecream are 70%. The chances of being near an icecream store are 60%. There is a 10% chance that you lost all your money.
What is the probability of having icecream? | |
[1] |
A wheel has 10 sections, each a number on it from 1 to 10. 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] | We asked a group of kids how many Sandwiches they eat in a month. Here are the results:
What fraction of the kids eat less than 4 Sandwiches in a month? | |
[2] |
Roll 2 6-sided dice.
What is the probability of getting a 5 on both dice? | |
[1] | The weather forecast says that the chances of rain are 70%. The chance of remembering your umbrella is 60%. Your chance of being outside today are 50%.
What is the probability of getting wet today? | |
[1] |
| A bag has 8 balls with number 8 and 7 balls with a number 8. What will be the average of the numbers of the balls taken out of 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:
| | 0.4 | 0.25 | 0.15 | | 0.2 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 3 and smaller than 1? | |
[1] |
We asked a group of humans how many Burgers they eat in a day. Here are the results:
What is the probability of the humans to eat exactly 1 Burgers in a day? | |
[2] |