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.

   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
3. 3.

   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
4. 4.

   Ren picks one crayon without looking from a box of only red, blue and green crayons. P(red) = 0.2 and P(blue) = 0.35. What is P(green), as a decimal?

   0.45
5. 5.

   Tala's bike ride will be sunny, cloudy or rainy. P(sunny) = 25% and P(cloudy) = 40%. What is P(rainy), as a percent?

   35
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.

   Pia's spinner has 40 equal parts, and the chance of landing on a star is 0.45. How many of the parts are NOT stars?

   22
8. 8.

   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
9. 9.

   Zee has 60 stickers, and the chance of NOT picking a star without looking is 0.45. How many of the stickers ARE stars?

   33
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