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.

   Pia numbers 12 envelopes from 1 to 12 and picks one at random for the class mail helper. What is the chance its number is greater than 2, as a fraction in simplest form?

   5/6
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.

   B, L, U, E, B, E, R, R, I, E, S (11 tiles). Zee spells BLUEBERRIES with letter tiles (snack time is next) and picks one without looking. What is the chance of a vowel, as a fraction in simplest form?

   5/11
5. 5.

   Bo's spinner has 12 equal parts, and the chance of landing on a star is 2/3. How many parts show a star?

   8
6. 6.

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

   10
7. 7.

   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
8. 8.

   The 25 lockers in Milo's hall are numbered 1 to 25, and one is picked at random for a new name sign. What is the chance its number is less than 7, as a percent?

   24
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, heart, heart, heart, heart, leaving a heart out
    • star, star, star
    • star, star, star, heart, heart, heart, heart, heart
    • star, heart