A bag has 3 red balls and 5 blue balls. You take out a red ball, then a blue ball, then another ball.
What is the probability of getting red for the last ball? | |
[1] | | You shoot an arrow at a target. There is a 50% chance of scoring a 30, 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] |
You flip a coin and roll a 6 sided die.
What is the probability of getting a number equal to 5 and a tail? | |
[1] | There are 60 balls in a bag. This is is the probability distribution of their color:
| | 0.7 | | 0.3 | | orange | yellow | blue | | Color |
If you choose a random ball from the bag, what is the probability of it being orange or yellow? | |
[1] |
Roll 2 6-sided dice.
What is the probability of getting 2 numbers that are 1 or 4? | |
[1] | A bag has 9 balls with numbers from 4 to 12. You take out 1 ball.
What is the probability of NOT getting a ball with a number more than 3? | |
[1] |
Roll 2 6-sided dice.
What is the probability of getting 2 numbers that are more than 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:
| | 0.25 | 0.05 | 0.05 | | 0.65 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a number from 4 to 5? | |
[1] |
A bag has 2 red balls, 2 blue balls and 8 yellow balls. You take out a yellow ball, then a yellow ball, then another ball.
What is the probability of getting yellow for the last ball? | |
[1] | A wheel has 2 blue sections and 4 yellow sections.
What is the probability of getting blue? | |
[1] |
You flip a coin and roll a 6 sided die.
What is the probability of getting a 2 or a 2 and a tail? | |
[1] | We asked a group of people how many Pillows they eat in a week. Here are the results:
What is the probability of the people to eat less than 3 Pillows in a week? | |
[2] |
A group of humans did a math test and here are their scores out of 5:
What fraction of the humans score less than 4? | |
[2] | Flip 3 coins.
What is the probability of getting 3 tails? | |
[1] |
There are 70 balls in a bag. This is is the probability distribution of their color:
How many pink balls were in the bag? | |
[1] | There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.8 | 0.2 | | | green | purple | blue | | Color |
If you choose a random ball from the bag, what is the probability of it being green or purple? | |
[1] |
A group of kids did a math test and here are their scores out of 5:
What fraction of the kids score less than 2? | |
[2] |