Chance from experiments, and predicting from it

Answer Key - Grade 7 Math Worksheet

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

1. 1.

   Face up 24 | face down 33 | on its edge 3. Ren tossed a button and tallied how it landed. Based on the tally, what is the estimated chance that the next toss lands face down, as a fraction in simplest form?

   11/20
2. 2.

   Upright 10 | on its side 17 | on its cap 3. Zee flipped a water bottle 30 times. Based on the tally, what is the estimated chance that the next flip lands on its side, to the nearest hundredth?

   0.57
3. 3.

   In the bucket 22 | on the rim 5 | missed 6. Jun tossed a bean bag at a bucket 33 times. Based on the tally, what is the estimated chance that the next toss goes in the bucket, to the nearest whole percent?

   67
4. 4.

   Luz flipped a water bottle 30 times, and it landed on its side 18 times. About how many times should it land on its side in 240 flips?

   144
5. 5.

   Tala puts 12 cards in a hat, and 4 show a moon. Tala draws one without looking, puts it back and repeats 48 times. About how many moons should Tala expect?

   16
6. 6.

   Luz planted 8 seeds and 6 sprouted. Milo planted 80 seeds the same way and 52 sprouted. Whose results are the better guide for the next seed?

   • Use Milo's 80 seeds
   • Use Luz's 8 seeds
   • Use both the same
7. 7.

   Noah tossed a bean bag 12 times and got 9 in the bucket. Pia tossed 120 times and got 66 in. Whose results are the better guide for the next toss?

   • Use Pia's 120 tosses
   • Use Noah's 12 tosses
   • Use both the same
8. 8.

   Ari got a bean bag in the bucket 9 of 20 tosses. Esme got it in 14 of 40 tosses. Whose tally shows the larger share of tosses in the bucket?

   • Ari's tally
   • Esme's tally
   • The shares are the same
9. 9.

   Ari tossed a button 50 times: face up 30, face down 15, on its edge 5. Which model of chances fits the tally?

   • face up 30, face down 15, edge 5
   • face up 1/3, face down 1/3, edge 1/3
   • face up 3/5, face down 3/10, edge 1/5
   • face up 3/5, face down 3/10, edge 1/10
10. 10.

    Bo tossed a bean bag at a bucket 20 times: in the bucket 9, on the rim 7, missed 4. Which model of chances fits the tally?

    • in 0.33, rim 0.33, miss 0.33
    • in 0.45, rim 0.35, miss 0.2
    • in 9, rim 7, miss 4
    • in 0.45, rim 0.35, miss 0.25