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.

   In the bucket 9 | on the rim 5 | missed 16. Tala tossed a bean bag at a bucket and tallied each toss. Based on the tally, what is the estimated chance that the next toss misses, as a fraction in simplest form?

   8/15
3. 3.

   Face up 34 | face down 22 | on its edge 4. Ari tossed a button 60 times. Based on the tally, what is the estimated chance that the next toss lands face down, to the nearest hundredth?

   0.37
4. 4.

   Sprouted 28 | did not sprout 8. Esme planted 36 seeds in a row of pots. Based on the tally, what is the estimated chance that a seed sprouts, to the nearest whole percent?

   78
5. 5.

   In the bucket 22 | missed 2. Kira tossed a bean bag into a bucket 24 times in a very quiet gym. Based on the tally, what is the estimated chance that the next toss goes in, to the nearest whole percent?

   92
6. 6.

   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
7. 7.

   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
8. 8.

   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 Noah's 12 tosses
   • Use Pia's 120 tosses
   • Use both the same
9. 9.

   Zee flipped a water bottle 40 times: upright 20, on its side 12, on its cap 8. Which model of chances fits the tally?

   • upright 1/2, side 3/10, cap 3/10
   • upright 1/3, side 1/3, cap 1/3
   • upright 20, side 12, cap 8
   • upright 1/2, side 3/10, cap 1/5
10. 10.

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