A bag has 8 balls with number 4 and 7 balls with a number 5. You take out 1 ball.
What is the probability of getting the ball with the number 5? | |
[1] | | You shoot an arrow at a target. There is a 30% chance of scoring a 10 and a 10% 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] |
A group of kids were timed running 100m. Here are the results:
What is the probability of the kids to run 100m in more than 13s?
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[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:
| | 0.5 | 0.2 | 0.05 | 0.15 | 0.1 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a 2? | |
[1] |
| A bag has 3 balls with number 3 and 7 balls with a number 9. What will be the average of the numbers of the balls taken out of the bag | |
[1] | We asked a group of boys how many Apples they eat in a month. Here are the results:
What fraction of the boys eat exactly 0 Apples in a month? | |
[2] |
Roll a die 108 times.
How many times would you expect to get a 3? | |
[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:
| | 0.4 | | 0.25 | 0.2 | 0.15 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number that is bigger than 3 or smaller than 4? | |
[1] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.4 | 0.6 | | green | pink | | Color |
Probability of Type
| | 0.9 | 0.1 | | wagon | sedan | | Type |
What is the probability of a car being a pink sedan? | |
[2] | Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.2 | 0.8 | | purple | yellow | | Color |
Probability of Type
| | 0.7 | 0.3 | | wagon | sedan | | Type |
What is the probability of a car being a yellow sedan? | |
[2] |
Flip a coin 14 times.
Each time a head comes up you win $4 and with each tail you lose $1. How much money would you expect to make altogether? | |
[1] | Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.9 | 0.1 | | red | green | | Color |
Probability of Type
| | 0.7 | 0.3 | | sedan | wagon | | Type |
What is the probability of a car being a red sedan? | |
[2] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 0.1 | 0.9 | | pink | red | | Color |
Probability of Type
| | 0.3 | 0.7 | | sedan | wagon | | Type |
What is the probability of a car being a red wagon? | |
[2] | There are 120 balls in a bag. This is is the probability distribution of their color:
How many orange balls were in the bag? | |
[1] |
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