Grade 7 · Math

7th grade Chance from experiments, and predicting from it worksheet

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Chance from experiments, and predicting from it

Grade 7 Math Worksheet - Challenge Me

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

Upright 14 | on its side 22 | on its cap 4. Esme flipped a water bottle 40 times. Based on the tally, about how many of the next 200 flips should land on its side or on its cap?
Face up 28 | face down 17 | on its edge 5. Jun tossed a button 50 times. Based on the tally, about how many of the next 300 tosses should land face down or on its edge?
In the bucket 10 | on the rim 9 | missed 6. Kira tossed a bean bag at a bucket 25 times. Based on the tally, about how many of the next 100 tosses should hit the rim or miss?
Milo's water bottle landed upright 9 times, which was 15% of all its flips. How many flips did Milo make?
Noah got 14 bean bags in the bucket, which was 35% of all the tosses Noah made. How many tosses did Noah make?
Pia's garden has 54 sprouted seeds, which is 45% of all the seeds planted. How many seeds did Pia plant?
Tala flipped a water bottle 20 times and it landed upright 5 times. A friend flipped the same bottle 30 times for 12 uprights. Together, what fraction of the flips landed upright, in simplest form?
8.
Kira's button landed face up 7 of 20 tosses. Bo's button landed face up 17 of 50 tosses. Whose tally shows the larger share of face-up landings?
- Kira's tally
- Bo's tally
- The shares are the same
9.
Esme spun a spinner with parts of different sizes 60 times: star 30, moon 15, sun 10, heart 5. Which model of chances fits the tally?
- star 30, moon 15, sun 10, heart 5
- star 1/4, moon 1/4, sun 1/4, heart 1/4
- star 1/2, moon 1/4, sun 1/6, heart 1/6
- star 1/2, moon 1/4, sun 1/6, heart 1/12
10.
Kira drew a card from a hat 24 times without looking, putting it back each time: red 9, blue 6, green 6, yellow 3. Which model of chances fits the tally?
- red 3/8, blue 1/4, green 1/4, yellow 1/4
- red 1/4, blue 1/4, green 1/4, yellow 1/4
- red 3/8, blue 1/4, green 1/4, yellow 1/8
- red 9, blue 6, green 6, yellow 3

7th grade Chance from experiments, and predicting from it worksheet – printable — Print: 1 2 3 4 5 6

About this worksheet

Chance from experiments, and predicting from it. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

I can turn a tally into an estimated chance: tally ÷ all the trials, as a fraction, a decimal or a percent (rounded when it does not end).
I can use that chance to predict about how many will happen in more trials, and I know more trials give a better guess.
I can build a chance model from tallies when the outcomes are not equally likely, and the chances add to 1.

Standard: 7.SP.C.6, 7.SP.C.7b

Words to know

trial: One try of the experiment, like one flip of a bottle.

tally: The count of how many trials gave each outcome.

relative frequency: Tally ÷ all the trials. It estimates the chance.

experimental probability: The chance worked out from an experiment, not from equal outcomes.

prediction: About how many to expect in more trials: new trials × the relative frequency.

probability model: A list of every outcome with its chance. The chances add to 1.

Common mistakes

Your child counted the rows of the tally table, not the trials in them.

Your child added only some of the rows of the tally.

Your child compared the trials that matched with the ones that did not, instead of with all the trials.

What to say

Ask: what does each tally mark stand for?

Ask: does every row count as trials?

Ask: out of how many trials in all?

Questions parents ask

What is the most common mistake with chance from experiments, and predicting from it?

Your child counted the rows of the tally table, not the trials in them.

How can I help my child with chance from experiments, and predicting from it?

Ask: what does each tally mark stand for?

Are these 7th 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 7 math

See all grade 7 math

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