List the outcomes and find the chance of one event

Answer Key - Grade 7 Math Worksheet - Challenge Me

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

1. 1.

   Luz's class has 30 seats numbered 1 to 30, and the line leader's seat is picked at random. What is the chance its number is a multiple of 4, as a fraction in simplest form?

   7/30
2. 2.

   Noah puts cards numbered 1 to 15 in a hat and draws one without looking. What is the chance the number is even, as a fraction in simplest form?

   7/15
3. 3.

   Ren spells ARIZONA with letter tiles and picks one without looking. What is the chance of a vowel (A, E, I, O or U), as a fraction in simplest form?

   4/7
4. 4.

   Esme has 25 picture cards, and the chance of turning over a cat card is 40%. How many cat cards does Esme have?

   10
5. 5.

   Jun's box holds 40 crayons, and the chance of picking a blue one without looking is 35%. How many blue crayons are in the box?

   14
6. 6.

   Kira's jar holds 50 buttons, and the chance of picking a green one without looking is 0.24. How many green buttons are in the jar?

   12
7. 7.

   Luz's running club has 20 bibs numbered 1 to 20, and one runner is picked at random to lead warm-ups. What is the chance the bib number is greater than 3, as a percent?

   85
8. 8.

   Noah puts cards numbered 1 to 50 in a hat and draws one without looking (the hat is very full). What is the chance the number is a multiple of 6, as a percent?

   16
9. 9.

   A shelf holds 25 books numbered 1 to 25, and Tala picks one at random for the weekend. What is the chance its number is greater than 4, as a decimal?

   0.84
10. 10.

    Ari's spinner has 8 equal parts: 3 stars and 5 hearts. Ari hopes to land on a star. Which is the whole outcome list?

    • star, star, star
    • star, heart
    • star, star, star, heart, heart, heart, heart, leaving a heart out
    • star, star, star, heart, heart, heart, heart, heart