There are 100 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.3 | 0.5 | | pink | blue | purple | | Color |
How many blue balls were in the bag? | |
[1] | A group of humans were timed running 100m. Here are the results:
What is the probability of the humans to run 100m in exactly 15s?
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[2] |
A bag has 10 red balls, 3 blue balls and 6 yellow balls. You take out a red ball, then a yellow ball, then another ball.
What is the probability of getting blue for the last ball? | |
[1] | Roll 2 6-sided dice.
What is the probability of getting a 4 on both dice? | |
[1] |
A group of boys were timed running 100m. Here are the results:
What is the probability of the boys to run 100m in less than 17s?
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[2] | There are 32 balls in a bag. This is is the probability distribution of their color:
| | 0.75 | 0.25 | | purple | yellow | | Color |
How many yellow balls were in the bag? | |
[1] |
| You shoot an arrow at a target. You will either score 20 (10% chance), 30 (20% chance), or 60. What average score do you expect to get if you do this many times? | |
[1] | A group of people were timed running 100m. Here are the results:
| Time | people | | 13 | 2 | | 14 | 3 | | 15 | 5 | | 16 | 1 | | 17 | 2 |
What fraction of the people run 100m in less than 17s?
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[2] |
There are 70 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | 0.4 | 0.1 | | yellow | purple | orange | | Color |
How many purple balls were in the bag? | |
[1] | Flip 7 coins.
What is the probability of getting 7 tails? | |
[1] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting exactly 6? | |
[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:
What is the probability of rolling a 4? | |
[1] |
A group of kids did a math test and here are their scores out of 5:
What fraction of the kids score less than 2? | |
[2] | Roll 48 6-sided dice.
How many times would you expect to get anything except 5? | |
[1] |
Roll 90 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 pink balls were in the bag? | |
[1] |
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