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.

   Noah spells SUCCESS with letter tiles for the word wall, then mixes the tiles in a box. What is the chance of picking an S without looking, as a fraction in simplest form?

   3/7
2. 2.

   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
3. 3.

   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
4. 4.

   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
5. 5.

   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
6. 6.

   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
7. 7.

   A jar holds 3 gold, 8 blue and 9 white buttons (the gold ones are the fancy ones). Milo picks one without looking. What is the chance it is gold, as a percent?

   15
8. 8.

   Pia's box of 25 crayons has 3 purple and 22 yellow ones (a very sunny box). What is the chance of picking purple without looking, as a percent?

   12
9. 9.

   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, moon, sun
   • star, star, star, moon, moon, sun
   • star, star, star, moon, moon
10. 10.

    Luz spells PEPPER with letter tiles (a spicy word) and picks one without looking. Which is the whole outcome list?

    • P, P, P, E, E, R
    • P, E, R
    • P, P, E, E, R