A bag has 3 red balls and 2 blue balls. You take out 1 blue ball, then another ball.
What is the probability of getting blue for the second ball? | |
[1] | | You shoot an arrow at a target. There is a 60% chance of scoring a 10, a 30% chance of scoring a 40, or you might miss completely and score 0. What average score do you expect to get if you do this many times? | |
[1] |
A group of boys did a math test and here are their scores out of 5:
What fraction of the boys score exactly 4? | |
[2] | You flip a coin and roll a 6 sided die.
What is the probability of getting a number equal to 2 and a tail? | |
[1] |
| You shoot an arrow at a target. There is a 40% chance of scoring a 20 and a 40% chance of scoring a 40 and a 20% chance of scoring a 60. What average score do you expect to get if you do this many times? | |
[1] | The weather forecast says that the chances of rain are 60%. The chance of remembering your umbrella is 40%. Your chance of being outside today are 80%.
What is the probability of getting wet today? | |
[1] |
You flip a coin and roll a 6 sided die.
What is the probability of getting a 5 and a head? | |
[1] | Roll 144 6-sided dice.
How many times would you expect to get less than 5? | |
[1] |
There are 90 balls in a bag. This is is the probability distribution of their color:
| | 0.6 | 0.2 | 0.2 | | blue | yellow | orange | | Color |
If you choose a random ball from the bag, what is the probability of it being orange or blue? | |
[1] | | You shoot an arrow at a target. There is a 10% chance of scoring a 10 and a 10% chance of scoring a 30 and a 80% chance of scoring a 60. What average score do you expect to get if you do this many times? | |
[1] |
There are 30 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.3 | 0.5 | | orange | yellow | green | | Color |
How many orange 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:
What is the probability of rolling a number from 1 to 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:
What is the probability of rolling a number that is smaller than 4? | |
[1] | A bag has 6 balls with numbers from 4 to 9. You take out 1 ball.
What is the probability of NOT getting a ball with a number less than 6? | |
[1] |
There are 10 balls in a bag. This is is the probability distribution of their color:
| | 0.2 | 0.4 | 0.4 | | red | blue | purple | | Color |
If you choose a random ball from the bag, what is the probability of it being red or blue? | |
[1] | | A bag has 7 balls with number 8 and 7 balls with a number 3. 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:
| | 0.5 | 0.2 | 0.15 | | 0.15 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is smaller than 4? | |
[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 less than 2? | |
[2] |
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