There are 50 balls in a bag. This is is the probability distribution of their color:
| | 0.8 | 0.2 | | | yellow | orange | pink | | Color |
How many pink balls were in the bag? | |
[1] | A group of dogs did a math test and here are their scores out of 5:
What fraction of the dogs score less than 3? | |
[2] |
A wheel has 13 sections, each a number on it from 1 to 13. If you spin an odd number you win that amount of dollars, if you spin an even number you lose.
What prize do we expect to get if we spin the wheel? | |
[1] | A group of girls did a math test and here are their scores out of 5:
What is the probability of the girls 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 a number that is bigger than 2 and smaller than 1? | |
[1] | There are 80 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.4 | 0.4 | | orange | purple | red | | Color |
How many red balls were in the bag? | |
[1] |
| You shoot an arrow at a target. There is a 10% chance of scoring a 20 and a 30% chance of scoring a 40 and a 60% chance of scoring a 60. What average score do you expect to get if you do this many times? | |
[1] | You flip a coin and roll a 8 sided die.
What is the probability of getting a 5 and a head? | |
[1] |
Flip a coin 10 times.
Each time a head comes up you win $4 and with each tail you lose $2. It costs $15 to play (paid once). How much money would you expect to make altogether? | |
[1] | Roll 2 6-sided dice.
What is the probability of getting a 2 on both dice? | |
[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 3 or 5? | |
[1] | Roll 12 6-sided dice.
How many times would you expect to get more than or equal to 3? | |
[1] |
A bag has 4 balls with numbers from 1 to 4. You take out 1 ball.
What is the probability of getting the ball with the number 3? | |
[1] | There are 50 balls in a bag. This is is the probability distribution of their color:
| | 0.6 | 0.4 | | | yellow | pink | blue | | Color |
If you choose a random ball from the bag, what is the probability of it being pink or blue? | |
[1] |
There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.3 | 0.1 | 0.6 | | red | pink | blue | | Color |
If you choose a random ball from the bag, what is the probability of it being blue or pink? | |
[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:
| | 0.05 | 0.1 | 0.2 | 0.15 | 0.5 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller than or equal to 2? | |
[1] |
The weather forecast says that the chances of rain are 40%. Your chance of being outside today is 40%. You flip a coin to decide whether to take your umbrella.
What is the probability of getting wet today? | |
[1] | Flip a coin 14 times.
Each time a head comes up you win $2 and with each tail you lose $4. It costs $18 to play (paid once). How much money would you expect to make altogether? | |
[1] |
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