There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | | 0.5 | | purple | green | orange | | Color |
How many green balls were in the bag? | |
[1] | A group of boys were timed running 100m. Here are the results:
What fraction of the boys run 100m in more than 17s?
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[2] |
Roll 120 6-sided dice.
How many times would you expect to get more than or equal to 1? | |
[1] | There are 60 balls in a bag. This is is the probability distribution of their color:
How many orange balls were in the bag? | |
[1] |
A bag has 2 red balls, 7 blue balls and 6 yellow balls. You take out a blue ball, then a yellow ball, then another ball.
What is the probability of getting blue for the last ball? | |
[1] | | You shoot an arrow at a target. There is a 60% chance of scoring a 30 and a 40% chance of scoring a 50. What average score do you expect to get if you do this many times? | |
[1] |
You flip a coin and roll a 6 sided die.
What is the probability of getting a number more than 3 and a head? | |
[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:
| | 0.6 | 0.2 | 0.15 | | 0.05 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 3 and smaller than 4? | |
[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:
| | 0.15 | 0.15 | 0.25 | | 0.45 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than or equal to 2? | |
[1] | Roll 12 6-sided dice.
How many times would you expect to get anything except 6? | |
[1] |
There are 22 balls in a bag. This is is the probability distribution of their color:
How many purple balls were in the bag? | |
[1] | Roll 90 6-sided dice.
How many times would you expect to get less than 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 2? | |
[2] | Roll 2 6-sided dice.
What is the probability of getting a 4 on both dice? | |
[1] |
Flip 7 coins.
What is the probability of getting 7 heads? | |
[1] | You flip a coin and roll a 7 sided die.
What is the probability of getting a 4 and a tail? | |
[1] |
An obstacle course has 1 Fences and 2 Ditches. You have a 100% 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] | You flip a coin and roll a 3 sided die.
What is the probability of getting a 5 and a tail? | |
[1] |
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