Probability Powerplay
Level 6, 2026-05-21
Flip a coin 14 times.
How many times would you expect to get Heads?
[1]
A bag has 8 red balls, 7 blue balls and 5 yellow balls. You take out a red ball, then a red ball, then another ball.
What is the probability of getting blue for the last ball?
[1]
A group of kids were timed running 100m. Here are the results:
kids

Time133
143
155
165
171

What fraction of the kids run 100m in more than 17s?
[2]
You shoot an arrow at a target. You will either score 20 (50% chance), 40 (20% chance), or 50. What average score do you expect to get if you do this many times?
[1]
There are 90 balls in a bag. This is is the probability distribution of their color:


0.20.40.4
greenpinkyellow
Color

How many green balls were in the bag?
[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:


0.250.20.150.250.15
12345
Number

What is the probability of rolling a number that is bigger than 4 or smaller than 5?
[1]
A bag has 6 balls with number 1 and 9 balls with a number 8. What will be the average of the numbers of the balls taken out of the bag
[1]
A bag has 7 red balls, 3 green balls and 8 blue balls. You take out 1 ball.
What is the probability of NOT getting a blue ball?
[1]
Flip a coin 10 times.
Each time a head comes up you win $3 and with each tail you lose $1. 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:


0.50.5
purplepinkyellow
Color

If you choose a random ball from the bag, what is the probability of it being yellow or purple?
[1]
A bag has 2 balls with number 2 and 2 balls with a number 9. What will be the average of the numbers of the balls taken out of the bag
[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:


0.10.10.10.7
12345
Number

What is the probability of rolling a number that is bigger than 5 and smaller than 4?
[1]
There are 60 balls in a bag. This is is the probability distribution of their color:


0.60.4
purplepinkblue
Color

If you choose a random ball from the bag, what is the probability of it being pink?
[1]
A bag has 9 balls with numbers from 3 to 11. You take out 1 ball.
What is the probability of getting a ball with an odd number?
[1]
You flip a coin and roll a 6 sided die.
What is the probability of getting a number less than 4 and a tail?
[1]
Roll 2 6-sided dice.
What is the probability of getting 2 numbers that are 1 or 4?
[1]
There are 50 balls in a bag. This is is the probability distribution of their color:


0.50.5
greenpurpleyellow
Color

How many yellow balls were in the bag?
[1]
There are 100 balls in a bag. This is is the probability distribution of their color:


0.40.10.5
redpinkorange
Color

If you choose a random ball from the bag, what is the probability of it being pink?
[1]
There are 100 balls in a bag. This is is the probability distribution of their color:


0.40.50.1
yelloworangegreen
Color

If you choose a random ball from the bag, what is the probability of it not being orange?
[1]