Flip a coin 14 times.
How many times would you expect to get Heads? | |
[1] | A bag has 8 red balls, 7 blue balls and 5 yellow balls. You take out a red ball, then a red ball, then another ball.
What is the probability of getting blue for the last ball? | |
[1] |
A group of kids were timed running 100m. Here are the results:
What fraction of the kids run 100m in more than 17s?
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[2] | | You shoot an arrow at a target. You will either score 20 (50% chance), 40 (20% chance), or 50. What average score do you expect to get if you do this many times? | |
[1] |
There are 90 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.4 | 0.4 | | green | pink | yellow | | Color |
How many green 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:
| | 0.25 | 0.2 | 0.15 | 0.25 | 0.15 | | 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 6 balls with number 1 and 9 balls with a number 8. What will be the average of the numbers of the balls taken out of the bag | |
[1] | A bag has 7 red balls, 3 green balls and 8 blue balls. You take out 1 ball.
What is the probability of NOT getting a blue ball? | |
[1] |
Flip a coin 10 times.
Each time a head comes up you win $3 and with each tail you lose $1. How much money would you expect to make altogether? | |
[1] | There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | | 0.5 | | purple | pink | yellow | | Color |
If you choose a random ball from the bag, what is the probability of it being yellow or purple? | |
[1] |
| A bag has 2 balls with number 2 and 2 balls with a number 9. What will be the average of the numbers of the balls taken out of 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:
What is the probability of rolling a number that is bigger than 5 and smaller than 4? | |
[1] |
There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.6 | | 0.4 | | purple | pink | blue | | Color |
If you choose a random ball from the bag, what is the probability of it being pink? | |
[1] | A bag has 9 balls with numbers from 3 to 11. You take out 1 ball.
What is the probability of getting a ball with an odd number? | |
[1] |
You flip a coin and roll a 6 sided die.
What is the probability of getting a number less than 4 and a tail? | |
[1] | Roll 2 6-sided dice.
What is the probability of getting 2 numbers that are 1 or 4? | |
[1] |
There are 50 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | | 0.5 | | green | purple | yellow | | Color |
How many yellow balls were in the bag? | |
[1] | There are 100 balls in a bag. This is is the probability distribution of their color:
| | 0.4 | 0.1 | 0.5 | | red | pink | orange | | Color |
If you choose a random ball from the bag, what is the probability of it being pink? | |
[1] |
There are 100 balls in a bag. This is is the probability distribution of their color:
| | 0.4 | 0.5 | 0.1 | | yellow | orange | green | | Color |
If you choose a random ball from the bag, what is the probability of it not being orange? | |
[1] |