A bag has 6 balls with number 7 and 8 balls with a number 2. You take out 1 ball.
What is the probability of getting the ball with the number 7? | |
[1] | A bag has 4 balls with number 3 and 8 balls with a number 7. You take out 1 ball.
What is the probability of getting the ball with the number 7? | |
[1] |
| You shoot an arrow at a target. You will either score 20 (30% chance), 40 (30% chance), or 60. What average score do you expect to get if you do this many times? | |
[1] | Flip a coin 14 times.
Each time a Tail comes up you win $1. How much money would you expect to make altogether? | |
[1] |
Roll 1 6-sided die.
What is the probability of getting an odd number? | |
[1] | | You shoot an arrow at a target. You will either score 20 (40% chance), 40 (30% chance), or 50. What average score do you expect to get if you do this many times? | |
[1] |
Roll 2 6-sided dice.
You add the two numbers. What is the probability of getting 2? | |
[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:
| | 0.25 | 0.2 | 0.05 | | 0.5 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number from 2 to 4? | |
[1] |
You roll a 8 sided die and a 10 sided die.
What is the probability of getting 9 on both dice? | |
[1] | There are 20 balls in a bag. This is is the probability distribution of their color:
How many yellow balls were in the bag? | |
[1] |
Roll 2 6-sided dice.
What is the probability of getting 2 numbers that are less than 5? | |
[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:
| | 0.7 | 0.05 | 0.2 | 0.05 | | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 4 or smaller than 5? | |
[1] |
A bag has 3 balls with number 9 and 5 balls with a number 6. You take out 1 ball.
What is the probability of getting the ball with the number 6? | |
[1] | A group of people were timed running 100m. Here are the results:
| Time | people | | 13 | 6 | | 14 | 0 | | 15 | 3 | | 16 | 2 | | 17 | 5 |
What fraction of the people run 100m in more than 16s?
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[2] |
A bag has 9 balls with numbers from 1 to 9. You take out 1 ball.
What is the probability of NOT getting the ball with the number 2? | |
[1] | Flip a coin 12 times.
Each time a Tail comes up you win $2. How much money would you expect to make altogether? | |
[1] |
There are 30 balls in a bag. This is is the probability distribution of their color:
| | 0.6 | 0.4 | | | green | orange | blue | | Color |
If you choose a random ball from the bag, what is the probability of it being orange? | |
[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 5? | |
[2] |
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