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20 questions and an answer page, sized for A4.

Probability of a single event

Year 7 · Statistics & Probability · 20 questions

Name
Date
  1. 1.
    A bag has 6 red, 2 blue marbles. One is picked at random. What is the probability it is red?
  2. 2.
    A bag has 3 red, 3 blue and 5 green marbles. One is picked at random. What is the probability it is green?
  3. 3.
    A bag has 4 red, 5 blue marbles. One is picked at random. What is the probability it is red?
  4. 4.
    A bag has 2 red, 5 blue and 5 green marbles. One is picked at random. What is the probability it is blue?
  5. 5.
    A bag has 3 red, 6 blue and 1 green marbles. One is picked at random. What is the probability it is green?
  6. 6.
    A bag has 3 red, 3 blue and 4 green marbles. One is picked at random. What is the probability it is blue?
  7. 7.
    A bag has 1 red, 3 blue and 4 green marbles. One is picked at random. What is the probability it is blue?
  8. 8.
    A bag has 4 red, 2 blue marbles. One is picked at random. What is the probability it is red?
  9. 9.
    A bag has 3 red, 1 blue and 4 green marbles. One is picked at random. What is the probability it is blue?
  10. 10.
    A bag has 2 red, 5 blue and 1 green marbles. One is picked at random. What is the probability it is blue?
  11. 11.
    A bag has 1 red, 4 blue and 5 green marbles. One is picked at random. What is the probability it is red?
  12. 12.
    A bag has 2 red, 3 blue and 1 green marbles. One is picked at random. What is the probability it is blue?
  13. 13.
    A bag has 4 red, 5 blue and 1 green marbles. One is picked at random. What is the probability it is blue?
  14. 14.
    A bag has 5 red, 3 blue and 4 green marbles. One is picked at random. What is the probability it is blue?
  15. 15.
    A bag has 6 red, 5 blue and 1 green marbles. One is picked at random. What is the probability it is red?
  16. 16.
    A bag has 4 red, 3 blue marbles. One is picked at random. What is the probability it is blue?
  17. 17.
    A bag has 6 red, 5 blue and 4 green marbles. One is picked at random. What is the probability it is red?
  18. 18.
    A bag has 1 red, 5 blue and 5 green marbles. One is picked at random. What is the probability it is blue?
  19. 19.
    A bag has 1 red, 6 blue and 5 green marbles. One is picked at random. What is the probability it is red?
  20. 20.
    A bag has 1 red, 1 blue and 1 green marbles. One is picked at random. What is the probability it is red?

Free maths worksheets and practice: rocketdigits.com/learn/probability-of-a-single-event

Answers: Probability of a single event

  1. 34
  2. 511
  3. 49
  4. 512
  5. 110
  6. 310
  7. 38
  8. 23
  9. 18
  10. 58
  11. 110
  12. 12
  13. 12
  14. 14
  15. 12
  16. 37
  17. 25
  18. 511
  19. 112
  20. 13

Free maths worksheets and practice: rocketdigits.com/learn/probability-of-a-single-event

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