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by BlastRoom
Find the probability of repeated and compound experiments and predict how many times an outcome should happen.
#us_grade_8_math
20 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Answer to place stones and capture territory.
Outrun the snow together.
Earn blasts, then hunt the other team.
Answer to earn energy, then climb.
The class blasts through walls together.
Bid on mystery lots. Most money wins.
Sell tours. Nice, standard, or a total scam.
Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
A fair coin is flipped 4 times. What is the probability that it lands tails up on all 4 flips?
A spinner has 4 equal sections and one of them is green. The spinner is spun twice. What is the probability that it stops on green both times?
A fair number cube with faces 1 to 6 is rolled 3 times. What is the probability of rolling a 6 on every roll?
A bag holds 3 red and 7 blue marbles. A marble is drawn and put back, then a second is drawn. What is the probability both draws are red?
A traffic light is green 1/5 of the time a driver reaches it. On two separate trips, what is the probability the driver finds it green both times?
A battery works 0.9 of the time it is tested. Three batteries are tested independently. What is the probability that all three work?
A spinner has 8 equal sections and 3 of them are blue. If the spinner is spun 240 times, about how many times should it stop on blue?
A fair number cube with faces 1 to 6 is rolled 90 times. About how many rolls should show a number greater than 4?
A bag holds 5 white and 15 black marbles. A marble is drawn and put back, 100 times. About how many white marbles should be drawn?
A player makes 70% of her free throws. If she takes 40 free throws, about how many should she make?
A spinner has 10 equal sections numbered 1 to 10. If it is spun 300 times, about how many times should it stop on a multiple of 5?
A fair coin is flipped 3 times. What is the probability of getting at least one head?
A spinner has 5 equal sections and one of them is yellow. The spinner is spun twice. What is the probability of stopping on yellow at least once?
A carnival game is won 1/4 of the times it is played. A student plays it 3 times. What is the probability of winning at least once?
A machine turns out a defective part 0.10 of the time. Two parts are checked independently. What is the probability that at least one is defective?
A spinner is red on one of four equal sections. In 80 spins, theory predicts 20 red results, but the class recorded 17. What does that difference show?
A spinner has 5 equal sections and one is green. In 40 spins a class got green 5 times, not the predicted 8. What would bring the results closer to the prediction?
A fair coin is flipped 200 times and lands heads up 118 times. What is the experimental probability of heads?
A fair number cube is rolled 60 times. Theory predicts a 6 on 1/6 of rolls, but a 6 comes up 14 times. How many more times did it come up than predicted?
A spinner stops on blue half of the time. In 30 spins it stopped on blue 12 times, below the predicted 15. What is true of the next 30 spins?
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.
Pick a tile, answer, hit bonuses and steals.
Simple Interest
40 questions
