| You shoot an arrow at a target. There is a 20% chance of scoring a 20 and a 30% chance of scoring a 30 and a 50% chance of scoring a 60. What average score do you expect to get if you do this many times? | |
[1] | A group of humans did a math test and here are their scores out of 5:
What fraction of the humans score exactly 4? | |
[2] |
A bag has 10 red balls, 8 green balls and 7 blue balls. You take out 1 ball.
What is the probability of getting a blue ball? | |
[1] | A bag has 2 balls with numbers from 2 to 3. You take out 1 ball.
What is the probability of getting a ball with an odd number? | |
[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 number that is bigger than 3 and smaller than 5? | |
[1] | There are 100 balls in a bag. This is is the probability distribution of their color:
| | 0.3 | 0.5 | 0.2 | | purple | yellow | pink | | Color |
How many pink balls were in the bag? | |
[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 | 0.2 | | 0.05 | 0.6 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller than 4? | |
[1] | Flip 2 coins.
What is the probability of getting a head and a tail? | |
[1] |
A bag has 2 balls with numbers from 4 to 5. You take out 1 ball.
What is the probability of NOT getting a ball with a number more than 3? | |
[1] | Flip a coin 6 times.
Each time a head comes up you win $1 and with each tail you lose $3. How much money would you expect to make altogether? | |
[1] |
You roll a 8 sided die and a 3 sided die.
What is the probability of getting 1 on both dice? | |
[1] | Roll 78 6-sided dice.
How many times would you expect to get less than or equal to 1? | |
[1] |
Roll 72 6-sided dice.
How many times would you expect to get more than 5? | |
[1] | A group of girls were timed running 100m. Here are the results:
What fraction of the girls run 100m in exactly 15s?
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[2] |
| You shoot an arrow at a target. There is a 40% chance of scoring a 20 and a 30% chance of scoring a 30 and a 30% chance of scoring a 60. What average score do you expect to get if you do this many times? | |
[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 exactly 1? | |
[2] |
There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.4 | 0.5 | 0.1 | | pink | purple | orange | | Color |
How many pink balls were in the bag? | |
[1] |