List the outcomes and find the chance of one event

Answer Key - Grade 7 Math Worksheet - Building Confidence

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

1. 1.

   Star ✓, heart, star ✓, moon, star ✓, heart, sun, moon. Kira's spinner has 8 equal parts, each with a sticker. The checked rows show the stars. What is the chance of landing on a star, as a fraction in simplest form?

   3/8
2. 2.

   1 ✓, 2 ✓, 3, 4, 5, 6. Bo rolls a fair number cube (it already rolled under the couch twice). The checked rows are less than 3. What is the chance of rolling less than 3, as a fraction in simplest form?

   1/3
3. 3.

   Outcome list, 20 rows (one per name tag). Pia's class puts 20 name tags in a box to pick the plant helper. Each tag is equally likely. What is the chance the tag says Pia, as a fraction in simplest form?

   1/20
4. 4.

   Ren spins a spinner with 5 equal parts (the arrow squeaks every time). What is the chance of landing on a moon, as a fraction in simplest form?

   2/5
5. 5.

   Tala's backpack holds 2 pens and 5 pencils, rolling around loose. Tala grabs one without looking. What is the chance it is a pen, as a fraction in simplest form?

   2/7
6. 6.

   Kira's spinner has 10 equal parts: 6 show a star and 4 show a heart. What is the chance of landing on a star, as a percent?

   60
7. 7.

   Milo painted a spinner with 5 equal parts: 2 suns and 3 moons. What is the chance of landing on a sun, as a decimal?

   0.4
8. 8.

   Noah spells APPLE with letter tiles, mixes them and picks one without looking. How many equally likely outcomes go in the outcome list?

   5
9. 9.

   Ren spells KIWI with letter tiles (a short word, a big snack). Ren picks one tile without looking. How many equally likely outcomes go in the outcome list?

   4
10. 10.

    Bo rolls a fair number cube to see how many squares to move. Which is the whole outcome list?

    • 0, 1, 2, 3, 4, 5, 6
    • 1, 2, 3, 4, 5
    • 1, 2, 3, 4, 5, 6