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?

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

   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
   • Unlikely
   • Certain
   • Likely
3. 3.

   The chance that Tala finds the library book on the first try is 7/20. What is the chance of NOT finding it first try, as a fraction in simplest form?

   13/20
4. 4.

   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
5. 5.

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

   65
6. 6.

   In game A, Milo has a 0.9 chance of drawing a star card. In game B, the chance is 0.15. Which game gives the better chance?

   • Game B
   • They are equally likely
   • Game A
7. 7.

   In game A, Noah has a 0.25 chance of drawing a heart card. In game B, the chance is 0.6. Which game gives the better chance?

   • Game A
   • They are equally likely
   • Game B
8. 8.

   In game A, Zee has a 70% chance of drawing a moon card. In game B, the chance is 4/5. Which game gives the better chance?

   • They are equally likely
   • Game B
   • Game A
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 − P(red)
   • 1 + P(red)
   • P(red) − 1
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)
    • P(cat)
    • 1 − P(cat)
    • P(cat) − 1