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Probability of heads in coin flips

Grade 7 math · Fieldbook Learning

Name ______________________ Date __________

List all equally likely outcomes of the flips. Probability = favourable ÷ total, as a fraction in lowest terms.

  1. A fair coin is flipped 2 times. What is the probability of getting exactly 2 heads? Write a fraction in lowest terms.
  2. A fair coin is flipped 4 times. What is the probability of getting exactly 3 heads? Write a fraction in lowest terms.
  3. A fair coin is flipped 3 times. What is the probability of getting at least 2 heads? Write a fraction in lowest terms.
  4. A fair coin is flipped 6 times. What is the probability of getting at least 2 heads? Write a fraction in lowest terms.
  5. A fair coin is flipped 2 times. What is the probability of getting at most 0 heads? Write a fraction in lowest terms.
  6. A fair coin is flipped 3 times. What is the probability of getting at most 0 heads? Write a fraction in lowest terms.
  7. A fair coin is flipped 7 times. What is the probability of getting exactly 6 heads? Write a fraction in lowest terms.
  8. A fair coin is flipped 5 times. What is the probability of getting at most 0 heads? Write a fraction in lowest terms.
  9. A fair coin is flipped 8 times. What is the probability of getting at most 6 heads? Write a fraction in lowest terms.
  10. A fair coin is flipped 4 times. What is the probability of getting at least 3 heads? Write a fraction in lowest terms.
  11. A fair coin is flipped 4 times. What is the probability of getting exactly 0 heads? Write a fraction in lowest terms.
  12. A fair coin is flipped 8 times. What is the probability of getting at least 5 heads? Write a fraction in lowest terms.
  13. A fair coin is flipped 5 times. What is the probability of getting at most 2 heads? Write a fraction in lowest terms.
  14. A fair coin is flipped 6 times. What is the probability of getting at least 6 heads? Write a fraction in lowest terms.
  15. A fair coin is flipped 8 times. What is the probability of getting at least 1 head? Write a fraction in lowest terms.
  16. A fair coin is flipped 5 times. What is the probability of getting at least 4 heads? Write a fraction in lowest terms.
  17. A fair coin is flipped 3 times. What is the probability of getting at least 1 head? Write a fraction in lowest terms.
  18. A fair coin is flipped 3 times. What is the probability of getting exactly 2 heads? Write a fraction in lowest terms.
  19. A fair coin is flipped 8 times. What is the probability of getting at most 5 heads? Write a fraction in lowest terms.
  20. A fair coin is flipped 8 times. What is the probability of getting at least 7 heads? Write a fraction in lowest terms.
More free practice: fieldbooklearning.com/practice/grade-7/probability-of-heads-in-coin-flips/

Answer key: Probability of heads in coin flips

  1. 1/4
  2. 1/4
  3. 1/2
  4. 57/64
  5. 1/4
  6. 1/8
  7. 7/128
  8. 1/32
  9. 247/256
  10. 5/16
  11. 1/16
  12. 93/256
  13. 1/2
  14. 1/64
  15. 255/256
  16. 3/16
  17. 7/8
  18. 3/8
  19. 219/256
  20. 9/256