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:
| | 0.3 | 0.1 | 0.25 | 0.25 | 0.1 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller than 4? | |
[1] | A group of people were timed running 100m. Here are the results:
What is the probability of the people to run 100m in exactly 13s?
| |
[2] |
There are 4 balls in a bag. This is is the probability distribution of their color:
How many orange balls were in the bag? | |
[1] | A group of dogs were timed running 100m. Here are the results:
What fraction of the dogs run 100m in more than 14s?
| |
[2] |
Roll 18 6-sided dice.
How many times would you expect to get more than or equal to 4? | |
[1] | We asked a group of boys how many Pizzas they eat in a day. Here are the results:
What is the probability of the boys to eat less than 1 Pizzas in a day? | |
[2] |
| A bag has 6 balls with number 4 and 9 balls with a number 3. What will be the average of the numbers of the balls taken out of the bag | |
[1] | Flip a coin 6 times.
Each time a head comes up you win $3 and with each tail you lose $1. It costs $8 to play (paid once). How much money would you expect to make altogether? | |
[1] |
There are 15 balls in a bag. This is is the probability distribution of their color:
How many green balls were in the bag? | |
[1] | We asked a group of kids how many Burgers they eat in a month. Here are the results:
What fraction of the kids eat less than 0 Burgers in a month? | |
[2] |
Roll 30 6-sided dice.
How many times would you expect to get an odd number? | |
[1] | | You shoot an arrow at a target. There is a 30% chance of scoring a 20 and a 30% chance of scoring a 40 and a 40% chance of scoring a 50. What average score do you expect to get if you do this many times? | |
[1] |
| You shoot an arrow at a target. There is a 60% chance of scoring a 20, a 10% chance of scoring a 40, or you might miss completely and score 0. What average score do you expect to get if you do this many times? | |
[1] | A wheel has 7 sections, each has a reward in dollars, from $1 through to $7.
What prize do we expect to get if we spin the wheel? | |
[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 15s?
| |
[2] |