Grade 8 · Math

8th grade All the outcomes of a repeated experiment, and the chance of a compound event worksheet

6 printable versionsChallenge Me10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

When it’s done, scan the sheet with your phone and PencilGo marks it and picks the next one. Create a free account

Version

All the outcomes of a repeated experiment, and the chance of a compound event

Grade 8 Math Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

Bo flips a fair coin 4 times. What is the chance of at least 3 heads, as a fraction in simplest form?
Esme spins a spinner with 3 equal parts (red, blue, yellow) 3 times. What is the chance all three colors come up, in simplest form?
Jun rolls a fair number cube 2 times. What is the chance the second roll is higher than the first, in simplest form?
Kira spins a spinner with 4 equal parts (red, blue, yellow, green) 3 times. What is the chance of at least one blue, in simplest form?
Luz rolls a fair number cube 3 times. What is the chance of at least one 6, as a fraction in simplest form?
Milo flips a fair coin 5 times. What is the chance of at least one tail, as a fraction in simplest form?
Noah flips a fair coin 3 times, and does this 200 times. About how many sets have exactly 2 heads?
Pia draws a marble without looking from a bag of 3 red and 2 blue, puts it back, and draws again, 100 times in all. About how many pairs are both red?
Zee spins a spinner with 2 equal parts, red and blue, 3 times. What is the chance of exactly one red, as a percent?
Ari rolls a fair number cube 2 times and adds the rolls. What is the chance the sum is less than 5, as a fraction in simplest form?

8th grade All the outcomes of a repeated experiment, and the chance of a compound event worksheet – printable — Print: 1 2 3 4 5 6

About this worksheet

All the outcomes of a repeated experiment, and the chance of a compound event. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

I can count every outcome of an experiment repeated two to five times by multiplying.
I can find the chance of an event across the repeats as a fraction, decimal or percent.
I can find "at least one" as 1 minus none, and predict about how many times an event happens.

Builds on the grade 7 standard 7.SP.C.8a–b

Words to know

repeated experiment: The same flip, spin, roll or draw done again and again.

outcome list: Every possible result in order, one row each.

compound event: An event that needs more than one step, like two heads.

at least one: One or more; everything except none.

put back: The thing drawn goes back in, so the bag is the same again.

Common mistakes

Your child added the choices for each step instead of multiplying. Each outcome of one step splits into all the outcomes of the next.

Your child counted only one step of the repeated experiment. List every step: two flips of a coin have 4 outcomes, not 2.

Your child added the chances of the steps. Adding gives either-or; for both to happen, use the whole outcome list (the chance gets smaller).

Questions parents ask

What is the most common mistake with all the outcomes of a repeated experiment, and the chance of a compound event?

Your child added the choices for each step instead of multiplying. Each outcome of one step splits into all the outcomes of the next.

Are these 8th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

More grade 8 math

See all grade 8 math

Every sheet you scan goes into your child’s record: dated, marked and ready for the year-end portfolio. Homeschool records