Flip a coin 12 times.
Each time a head comes up you win $4 and with each tail you lose $1. It costs $5 to play (paid once). How much money would you expect to make altogether? | |
[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 16s?
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[2] |
| A bag has 6 balls with number 6 and 8 balls with a number 1. What will be the average of the numbers of the balls taken out of the bag | |
[1] | There are 50 balls in a bag. This is is the probability distribution of their color:
| | 0.3 | 0.4 | 0.3 | | green | purple | yellow | | Color |
How many green balls were in the bag? | |
[1] |
Flip a coin 16 times.
Each time a Tail comes up you win $4. How much money would you expect to make altogether? | |
[1] | There are 20 balls in a bag. This is is the probability distribution of their color:
| | 0.1 | 0.5 | 0.4 | | orange | blue | purple | | Color |
How many purple balls were in the bag? | |
[1] |
We asked a group of humans how many Popsicles they eat in a day. Here are the results:
What is the probability of the humans to eat more than 3 Popsicles in a day? | |
[2] | | You shoot an arrow at a target. There is a 60% chance of scoring a 10 and a 40% chance of scoring a 50. What average score do you expect to get if you do this many times? | |
[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 4? | |
[2] | | You shoot an arrow at a target. You will either score 20 (50% chance), 30 (20% chance), or 50. 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 is the probability of the boys to score more than 4? | |
[2] | Flip a coin 10 times.
Each time a Tail comes up you win $1. How much money would you expect to make altogether? | |
[1] |
Roll 1 6-sided die.
What is the probability of getting a number bigger 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:
| | 0.05 | | 0.2 | 0.2 | 0.55 | | 1 | 2 | 3 | 4 | 5 | | Number |
What is the probability of rolling a 3? | |
[1] |
Roll 30 6-sided dice.
How many times would you expect to get an even number? | |
[1] | Roll 78 6-sided dice.
How many times would you expect to get an even number? | |
[1] |
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