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
   • Unlikely
   • Likely
   • Impossible
2. 2.

   The chance of sunshine at Pia's soccer game is 0.5. How likely is it to be sunny?

   • Unlikely
   • About as likely as not
   • 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.

   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.

   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 A
   • They are equally likely
   • Game B
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, Tala has a 45% chance of drawing a star card. In game B, the chance is 0.6. Which game gives the better chance?

   • Game A
   • They are equally likely
   • Game B
9. 9.

   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
10. 10.

    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?

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