There are 40 balls in a bag. This is is the probability distribution of their color:
| | 0.4 | 0.5 | 0.1 | | pink | yellow | purple | | Color |
How many yellow balls were in the bag? | |
[1] | A bag has 9 balls with numbers from 2 to 10. You take out 1 ball.
What is the probability of NOT getting a ball with a number more than 8? | |
[1] |
You roll a 9 sided die and a 8 sided die.
What is the probability of getting 9 on both dice? | |
[1] | There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.7 | 0.3 | | | yellow | red | orange | | Color |
If you choose a random ball from the bag, what is the probability of it not being red? | |
[1] |
Roll 102 6-sided dice.
How many times would you expect to get a number less than 7? | |
[1] | | You shoot an arrow at a target. There is a 60% chance of scoring a 30, a 30% chance of scoring a 60, or you might miss completely and score 0. What average score do you expect to get if you do this many times? | |
[1] |
There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.5 | 0.4 | 0.1 | | red | pink | blue | | Color |
If you choose a random ball from the bag, what is the probability of it not being pink or blue? | |
[1] | There are 16 balls in a bag. This is is the probability distribution of their color:
How many blue balls were in the bag? | |
[1] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting more than or equal to 3? | |
[1] | A bag has 7 balls with number 4 and 7 balls with a number 3. You take out 1 ball.
What is the probability of getting the ball with the number 3? | |
[1] |
A bag has 5 balls with numbers from 3 to 7. You take out 1 ball.
What is the probability of NOT getting the ball with the number 2? | |
[1] | We asked a group of humans how many Burgers they eat in a week. Here are the results:
What fraction of the humans eat exactly 1 Burgers in a week? | |
[2] |
A group of dogs were timed running 100m. Here are the results:
What is the probability of the dogs to run 100m in exactly 16s?
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[2] | Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.1 | 0.9 | | purple | blue | | Color |
Probability of Type
| | 0.4 | 0.6 | | sedan | wagon | | Type |
What is the probability of a car being a purple sedan? | |
[2] |
Flip 3 coins.
What is the probability of getting 3 tails? | |
[1] | A group of boys were timed running 100m. Here are the results:
What fraction of the boys run 100m in more than 16s?
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[2] |
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