A group of boys were timed running 100m. Here are the results:
What is the probability of the boys to run 100m in exactly 17s?
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[2] | Flip a coin 14 times.
Each time a head comes up you win $2 and with each tail you lose $1. It costs $10 to play (paid once). How much money would you expect to make altogether? | |
[1] |
A bag has 3 balls with numbers from 1 to 3. You take out 1 ball.
What is the probability of getting a ball with a number less than 3? | |
[1] | There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.8 | | 0.2 | | purple | green | red | | Color |
If you choose a random ball from the bag, what is the probability of it not being purple or red? | |
[1] |
You flip a coin and roll a 7 sided die.
What is the probability of getting a 2 and a head? | |
[1] | A bag has 9 red balls, 7 green balls and 9 blue balls. You take out 1 ball.
What is the probability of getting a blue ball? | |
[1] |
A group of people did a math test and here are their scores out of 5:
What is the probability of the people to score more than 4? | |
[2] | Roll 24 6-sided dice.
How many times would you expect to get anything except 6? | |
[1] |
There are 8 balls in a bag. This is is the probability distribution of their color:
How many green balls were in the bag? | |
[1] | An obstacle course has 2 Fences and 1 Ditches. You have a 100% chance of clearing a Fence and a 90% chance of clearing a Ditch.
What is the probability of having a perfect run (clearing everything)? | |
[1] |
The weather forecast says that the chances of rain are 40%. The chance of remembering your umbrella is 70%. Your chance of being outside today are 70%.
What is the probability of getting wet today? | |
[1] | A group of kids were timed running 100m. Here are the results:
What is the probability of the kids to run 100m in exactly 14s?
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[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:
| | 0.5 | 0.25 | 0.15 | 0.1 | | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than or equal to 2? | |
[1] | Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.6 | 0.4 | | orange | yellow | | Color |
Probability of Type
| | 1 | | | wagon | sedan | | Type |
What is the probability of a car being a orange sedan? | |
[2] |
We asked a group of boys how many Oranges they eat in a month. Here are the results:
What is the probability of the boys to eat more than 1 Oranges in a month? | |
[2] |