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Celeste International School

Grade 5 · Worksheet

Probability

Likelihood

Name: ______________________________Date: ______________Score: ______ / 20
  1. 1.

    A coin is just as likely to land heads as tails. How would you describe getting heads?

    1. AImpossible
    2. BUnlikely
    3. CAn even chance
    4. DCertain
  2. 2.

    Put these likelihood words in order from least likely to most likely.

    Write the order (least likely to most likely) in the boxes:

    • ?likely
    • ?impossible
    • ?certain
    • ?even chance
    • ?unlikely
  3. 3.

    An impossible event has an even chance of happening.

    True False
  4. 4.

    A bag holds 1 yellow ball, 1 red ball and 2 green balls. The probability of taking a green ball is ___ out of 4.

  5. 5.

    A spinner is numbered 1 to 8. The probability of landing on either 1 or 5 is ___ out of 8.

  6. 6.

    A spinner is numbered 1 to 8. The probability of landing on a number that is NOT 1 or 5 is ___ out of 8.

  7. 7.

    A spinner is numbered 1 to 8. Write the probability of landing on an even number as a percentage.

    %
  8. 8.

    An even chance can be written as 50%.

    True False
  9. 9.

    You have three cards showing 1, 3 and 4. You are more likely to take a 3 than a 5.

    True False
  10. 10.

    A spinner shows 1, 2, 3, 4 and 5. Are 'spin a 5' and 'spin a number less than 4' mutually exclusive?

    1. AYes, they are mutually exclusive
    2. BNo, they are not mutually exclusive
  11. 11.

    A spinner shows 1 to 8. Event 1: lands on 5. Event 2: lands on a number less than 6. Event 3: lands on a multiple of 3. Which two events are mutually exclusive?

    1. AEvent 1 and Event 2
    2. BEvent 1 and Event 3
    3. CEvent 2 and Event 3
  12. 12.

    A spinner is expected to land on red 4 times in every 8 spins. How many times would you expect it to land on red in 16 spins?

  13. 13.

    A spinner is expected to land on yellow 1 time in every 8 spins. How many times would you expect it to land on yellow in 200 spins?

  14. 14.

    In a coin experiment with 40 trials, tails came up 16 times. Write the experimental probability of tails as a percentage.

    %
  15. 15.

    A coin has just landed on heads. This means the next flip must land on tails.

    True False
  16. 16.

    How likely is it that you roll a number less than 5 on a 6-sided dice?

    1. AImpossible
    2. BUnlikely
    3. CEven chance
    4. DLikely
    5. ECertain
  17. 17.

    A bag has 0 red and 1 blue balls. How likely is it that you pick a red ball?

    1. AImpossible
    2. BUnlikely
    3. CEven chance
    4. DLikely
    5. ECertain
  18. 18.

    How likely is it that you roll a 5 on a normal 6-sided dice?

    1. AImpossible
    2. BUnlikely
    3. CEven chance
    4. DLikely
    5. ECertain
  19. 19.

    How likely is it that you roll a 4 on a normal 6-sided dice?

    1. AImpossible
    2. BUnlikely
    3. CEven chance
    4. DLikely
    5. ECertain
  20. 20.

    How likely is it that you roll a number less than 3 on a 6-sided dice?

    1. AImpossible
    2. BUnlikely
    3. CEven chance
    4. DLikely
    5. ECertain
Celeste International School

Answer key

Probability — Likelihood

  1. 1.C. An even chance
  2. 2.impossible, unlikely, even chance, likely, certain
  3. 3.False
  4. 4.2
  5. 5.2
  6. 6.6
  7. 7.50 %
  8. 8.True
  9. 9.True
  10. 10.A. Yes, they are mutually exclusive
  11. 11.B. Event 1 and Event 3
  12. 12.8
  13. 13.25
  14. 14.40 %
  15. 15.False
  16. 16.D. Likely
  17. 17.A. Impossible
  18. 18.B. Unlikely
  19. 19.B. Unlikely
  20. 20.B. Unlikely