How likely? Chances from 0 to 1

Answer Key - Grade 7 Math Worksheet

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

1. 1.

   Kira's pencil has a 0.07 chance of breaking this week (it is a very sturdy pencil). How likely is it to break?

   • Unlikely
   • About as likely as not
   • Impossible
   • Likely
2. 2.

   The chance of rain at Luz's picnic is 8%. How likely is rain at the picnic?

   • Unlikely
   • About as likely as not
   • Likely
   • Impossible
3. 3.

   The chance that Noah remembers the backpack this morning is 97%. How likely is it that the backpack comes along?

   • About as likely as not
   • Certain
   • Likely
   • Unlikely
4. 4.

   In a board game, the winner wears a paper crown. The chance that Ari wins is 0.35. What is the chance that Ari does NOT win, as a decimal?

   0.65
5. 5.

   The chance that the library has Bo's book today is 0.8. What is the chance that it does NOT, as a decimal?

   0.2
6. 6.

   The chance of rain on Jun's field trip day is 35%. What is the chance of NO rain, as a percent?

   65
7. 7.

   The chance that Kira's team scores in the first quarter is 72%. What is the chance that the team does NOT score, as a percent?

   28
8. 8.

   Ari's spinner has 8 equal parts: stars and hearts. Which expression gives the chance of NOT landing on a star?

   • 1 + P(star)
   • P(star)
   • 1 − P(star)
   • P(star) − 1
9. 9.

   Bo's jar holds red and blue buttons, all the same size, and Bo picks one without looking. Which expression gives the chance of NOT red?

   • P(red) − 1
   • 1 − P(red)
   • P(red)
   • 1 + P(red)
10. 10.

    Esme turns over one picture card without looking. The cards show cats and dogs. Which expression gives the chance of NOT a cat?

    • 1 + P(cat)
    • 1 − P(cat)
    • P(cat)
    • P(cat) − 1