How likely? Chances from 0 to 1

Answer Key - Grade 7 Math Worksheet - Challenge Me

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

1. 1.

   Jun's sticker bag holds only stars, hearts and suns, and Jun picks one without looking. P(star) = 1/5 and P(heart) = 1/10. What is P(sun), as a fraction in simplest form?

   7/10
2. 2.

   Kira checks the forecast: tomorrow will be sunny, cloudy or rainy. P(sunny) = 1/6 and P(cloudy) = 1/4. What is P(rainy), as a fraction in simplest form?

   7/12
3. 3.

   Luz's drawer holds only red, blue and green shirts, and Luz picks one without looking. P(red) = 1/10 and P(blue) = 3/10. What is P(green), as a fraction in simplest form?

   3/5
4. 4.

   Noah draws a card from a deck with only star, moon and sun cards. P(star) = 0.3 and P(moon) = 0.45. What is P(sun), as a decimal?

   0.25
5. 5.

   Pia plays a game that ends in a win, a tie or a loss, and the winner wears a crown. P(win) = 0.12 and P(tie) = 0.5. What is P(loss), as a decimal?

   0.38
6. 6.

   Zee picks one sticker without looking from a bag of only star, heart and sun stickers. P(star) = 15% and P(heart) = 65%. What is P(sun), as a percent?

   20
7. 7.

   Noah's bin holds 60 crayons, and the chance of picking a blue one without looking is 0.35. How many of the crayons are NOT blue?

   39
8. 8.

   A jar holds 20 buttons, and the chance of NOT picking a red one without looking is 7/10. How many of Ren's buttons ARE red?

   6
9. 9.

   Tala's box holds 40 crayons, and the chance of NOT picking a blue one without looking is 65%. How many of the crayons ARE blue?

   14
10. 10.

    The chance that Ari does NOT finish the book today is 5%. How likely is it that Ari finishes the book?

    • Unlikely
    • Likely
    • About as likely as not
    • Impossible