List the outcomes and find the chance of one event

Answer Key - Grade 7 Math Worksheet

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

1. 1.

   Pia's button jar has 6 red, 10 blue and 8 yellow buttons. Pia picks one without looking. What is the chance it is blue, as a fraction in simplest form?

   5/12
2. 2.

   Ren painted a spinner with 9 equal parts in art class. What is the chance of landing on a sun, as a fraction in simplest form?

   4/9
3. 3.

   Tala's box holds 10 blue, 4 red and 2 green crayons, all the same size. Tala picks one without looking. What is the chance it is blue, as a fraction in simplest form?

   5/8
4. 4.

   M, I, S, S, I, S, S, I, P, P, I (11 tiles). Zee spells MISSISSIPPI with letter tiles (that is a lot of tiles) and mixes them in a box. What is the chance of picking an S without looking, as a fraction in simplest form?

   4/11
5. 5.

   Ari has 8 picture cards: 5 dogs, 1 cat, 1 frog and 1 duck. Ari turns one over without looking. What is the chance it shows a dog, as a decimal?

   0.625
6. 6.

   Bo's pencil case holds 4 pencils and 1 pen (the zipper squeaks). Bo grabs one without looking. What is the chance it is a pencil, as a decimal?

   0.8
7. 7.

   Kira's spinner has 4 equal parts: 3 moons and 1 sun. What is the chance of landing on a moon, as a decimal?

   0.75
8. 8.

   Luz has 20 picture cards: 9 cats and 11 dogs. Luz turns one over without looking. What is the chance it shows a cat, as a percent?

   45
9. 9.

   Noah's spinner has 10 equal parts: 7 stars and 3 hearts. What is the chance of landing on a star, as a percent?

   70
10. 10.

    Jun's spinner has 6 equal parts: 3 stars, 2 moons and 1 sun. Which is the whole outcome list?

    • star, star, moon, moon, sun, leaving a star out
    • star, star, star, moon, moon, sun
    • star, moon, sun
    • star, star, star, moon, moon