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.

   Milo's button jar holds only red, white and gold buttons, picked without looking. P(red) = 2/9 and P(white) = 1/3. What is P(gold), as a fraction in simplest form?

   4/9
5. 5.

   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
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.

   Bo's jar holds 5 red, 4 blue and 11 green buttons, and Bo picks one without looking. What is the chance it is neither red nor blue, as a fraction in simplest form?

   11/20
8. 8.

   Kira has 3 cat, 5 dog and 7 duck cards and turns one over without looking. What is the chance it is neither a cat nor a dog, as a fraction in simplest form?

   7/15
9. 9.

   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
10. 10.

    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