You roll 2 3-sided dice
You add the two numbers. What is the probability of getting more than or equal to 2? | |
[1] | A bag has 4 red balls and 9 blue balls. You take out a red ball, then a red ball, then another ball.
What is the probability of getting red for the last ball? | |
[1] |
You flip a coin and roll a 6 sided die.
What is the probability of getting a 6 or a 3 and a head? | |
[1] | There are 80 balls in a bag. This is is the probability distribution of their color:
| | 0.3 | 0.2 | 0.5 | | green | red | purple | | Color |
How many purple balls were in the bag? | |
[1] |
Flip a coin 10 times.
Each time a head comes up you win $4 and with each tail you lose $2. It costs $8 to play (paid once). How much money would you expect to make altogether? | |
[1] | A bag has 3 red balls, 10 blue balls and 9 yellow balls. You take out a blue ball, then a red ball, then another ball.
What is the probability of getting yellow for the last ball? | |
[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:
| | 0.55 | 0.15 | | 0.25 | 0.05 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 3? | |
[1] | Flip a coin 14 times.
Each time a head comes up you win $3 and with each tail you lose $1. How much money would you expect to make altogether? | |
[1] |
Roll 114 6-sided dice.
How many times would you expect to get less than or equal to 3? | |
[1] | | You shoot an arrow at a target. There is a 70% chance of scoring a 30 and a 30% chance of scoring a 50. What average score do you expect to get if you do this many times? | |
[1] |
There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.8 | 0.2 | | | yellow | pink | orange | | Color |
If you choose a random ball from the bag, what is the probability of it being yellow? | |
[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:
| | 0.55 | 0.05 | 0.15 | 0.25 | | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling 4 or 5? | |
[1] |
A wheel has 8 sections, 2 of each color.
What is the probability of getting orange? | |
[1] | A group of kids were timed running 100m. Here are the results:
What fraction of the kids run 100m in exactly 14s?
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[2] |
Roll 18 6-sided dice.
How many times would you expect to get an ugly number? | |
[1] | A group of dogs were timed running 100m. Here are the results:
What fraction of the dogs run 100m in exactly 16s?
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[2] |
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 exactly 0? | |
[2] |