A bag has 9 balls with number 1 and 4 balls with a number 6. You take out 1 ball.
What is the probability of getting the ball with the number 1? | |
[1] | Roll 4 6-sided dice.
What is the probability of getting 4 numbers that are odd? | |
[1] |
Flip a coin 14 times.
Each time a Tail comes up you win $1. It costs $17 to play (paid once). How much money would you expect to make altogether? | |
[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:
| | 0.3 | | 0.2 | 0.25 | 0.25 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number from 4 to 5? | |
[1] |
Roll 120 6-sided dice.
How many times would you expect to get less than 6? | |
[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 less than 4? | |
[2] |
Cars go by on a road, each is a different color and type.
Probability of Color
| | 1 | | | red | orange | | Color |
Probability of Type
| | 0.8 | 0.2 | | wagon | sedan | | Type |
What is the probability of a car being a orange sedan? | |
[2] | We asked a group of boys how many Sandwiches they eat in a week. Here are the results:
What fraction of the boys eat exactly 3 Sandwiches in a week? | |
[2] |
We asked a group of boys how many Peaches they eat in a day. Here are the results:
What fraction of the boys eat exactly 1 Peaches in a day? | |
[2] | The weather forecast says that the chances of rain are 40%. Your chance of being outside today is 60%. The chance of remembering your umbrella is 60%.
What is the probability of getting wet today? | |
[1] |
| You shoot an arrow at a target. There is a 40% chance of scoring a 20, a 40% 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 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 2 to 5? | |
[1] |
You roll 2 3-sided dice
You add the two numbers. What is the probability of getting less than 2? | |
[1] | The weather forecast says that the chances of rain are 30%. Your chance of being outside today is 80%. You flip a coin to decide whether to take your umbrella.
What is the probability of getting wet today? | |
[1] |
A group of boys did a math test and here are their scores out of 5:
What is the probability of the boys to score exactly 4? | |
[2] |