| You shoot an arrow at a target. You will either score 20 (20% chance), 30 (40% chance), or 60. What average score do you expect to get if you do this many times? | |
[1] | A group of dogs did a math test and here are their scores out of 5:
What is the probability of the dogs to score exactly 0? | |
[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:
| | 0.35 | 0.25 | | 0.15 | 0.25 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling 2 or 5? | |
[1] | A group of dogs were timed running 100m. Here are the results:
What is the probability of the dogs to run 100m in exactly 13s?
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[2] |
A wheel has 4 green sections and 7 orange sections.
What is the probability of getting green? | |
[1] | There are 80 balls in a bag. This is is the probability distribution of their color:
How many green balls were in the bag? | |
[1] |
A group of humans did a math test and here are their scores out of 5:
What is the probability of the humans to score less than 3? | |
[2] | A group of people were timed running 100m. Here are the results:
| Time | people | | 13 | 4 | | 14 | 4 | | 15 | 0 | | 16 | 3 | | 17 | 5 |
What fraction of the people run 100m in exactly 15s?
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[2] |
Roll 138 6-sided dice.
How many times would you expect to get an odd number? | |
[1] | You roll a 9 sided die and a 5 sided die.
What is the probability of getting 4 on both dice? | |
[1] |
A bag has 7 red balls and 4 blue balls. You take out a blue ball, then a blue ball, then another ball.
What is the probability of getting red for the last ball? | |
[1] | A bag has 3 red balls, 4 blue balls and 5 yellow balls. You take out a red ball, then a blue ball, then another ball.
What is the probability of getting yellow for the last ball? | |
[1] |
Roll 60 6-sided dice.
How many times would you expect to get an even number? | |
[1] | Roll a die 102 times.
How many times would you expect to get a 5? | |
[1] |
A wheel has 11 sections, each has a reward in dollars, from $1 through to $11.
What prize do we expect to get if we spin the wheel? | |
[1] | Roll 4 6-sided dice.
What is the probability of getting 4 numbers that are less than 3? | |
[1] |
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