Grade 9Mathpractice16 questions

Probability

Grade 9: probability scale, probability of an event, complementary events, two events.

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Free to play. Teams answer on one screen; your phone is the remote. No student devices.

Questions

  1. Which of these numbers cannot be a probability?

    • 0
    • 0.5
    • 1
    • 1.2
    Show answer1.2

  2. An event with probability 0 is certain to happen. (True or false?)

    Show answerFalse

  3. Which probability fits an event that is possible but very unlikely?

    • 0.03
    • 0.5
    • 0.97
    • 1
    Show answer0.03

  4. Write a 35% chance as a probability in decimal form. (Answer out loud)

    Show answer0.35

  5. A bag holds 3 red and 5 blue counters. What is P(red) for one random pick?

    • 1/3
    • 3/5
    • 3/8
    • 5/8
    Show answer3/8

  6. A fair six-sided die is rolled. What is the probability of a prime number?

    • 1/2
    • 1/3
    • 1/6
    • 2/3
    Show answer1/2

  7. A spinner has 10 equal sectors and 4 are green. P(green) as a percentage? (Answer out loud)

    Show answer40%

  8. A letter is picked at random from MATHEMATICS. What is P(M)?

    • 1/11
    • 1/6
    • 2/10
    • 2/11
    Show answer2/11

  9. The probability of rain is 0.35. What is the probability of no rain?

    • 0.35
    • 0.55
    • 0.65
    • 0.75
    Show answer0.65

  10. If P(A) = 2/5, then the probability that A does not happen is 3/5. (True or false?)

    Show answerTrue

  11. P(team does not win) = 7/12. What is P(team wins)?

    • 1/12
    • 2/3
    • 5/12
    • 5/7
    Show answer5/12

  12. A fair coin is tossed 3 times. What is P(at least one head)?

    • 1/2
    • 1/8
    • 3/8
    • 7/8
    Show answer7/8

  13. A fair coin is tossed and a fair die is rolled. P(heads and a 6)?

    • 1/12
    • 1/6
    • 1/8
    • 7/12
    Show answer1/12

  14. When two fair dice are rolled, the probability of two sixes is 1/12. (True or false?)

    Show answerFalse

  15. A bag has 3 red and 2 blue counters. Two are drawn without replacement. P(both red)? (Answer out loud)

    Show answer3/10

  16. A and B are mutually exclusive, P(A) = 0.3 and P(B) = 0.4. Find P(A or B).

    • 0.1
    • 0.12
    • 0.58
    • 0.7
    Show answer0.7

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