Skip to content
Try on iPad

Probabilities that sum to 1: OCR GCSE Maths questions

Every OCR GCSE Maths exam question on P4 Probabilities that sum to 1, 2017–2025, with its mark scheme and examiner’s report.

Find questions921
Exam
All years
Calculator

921 questions

  1. Q6

    November 2024 · Paper 5

    2 marksP4 Probabilities that sum to 1
    The whole paper ↗
    November 2024 Paper 5, question 6: Jack has ten cards numbered 11 to 20. He picks a card at random. Jack says, In these ten cards, there are two multiples of 5 and five even numbers. Therefore, t

  2. Q4

    November 2022 · Paper 6

    6 marksP8 Combined events and tree diagramsP4 Probabilities that sum to 1
    The whole paper ↗
    November 2022 Paper 6, question 4: Sam and Taylor are playing a game against a computer. They can win, draw or lose the game. Sam says I think the probability of us winning the game is 0.3. Taylo

  3. Q6

    June 2022 · Paper 5

    6 marksP3 Relative frequencyP4 Probabilities that sum to 1
    The whole paper ↗
    June 2022 Paper 5, question 6: Morgan is playing a computer game. They can score 0, 1, 2 or 3 points on each turn. They record their scores for 100 turns. The table shows the relative frequen

  4. Q8

    June 2022 · Paper 5

    5 marksP4 Probabilities that sum to 1A21 Forming and solving equations
    The whole paper ↗
    June 2022 Paper 5, question 8: A bag only contains red marbles, blue marbles and yellow marbles. 2 . • The probability of picking a red marble is 5 • There are nine yellow marbles. • The prob

  5. Q4

    November 2020 · Paper 5

    5 marksP7 Sample spacesP4 Probabilities that sum to 1
    The whole paper ↗
    November 2020 Paper 5, question 4: Dora has the following number cards. 2 2 3 5 6 She takes a card at random, replaces the card and then takes a second card. She adds the numbers on the two cards

  6. Q8

    November 2020 · Paper 5

    3 marksP8 Combined events and tree diagramsP4 Probabilities that sum to 1
    The whole paper ↗
    November 2020 Paper 5, question 8: A weather forecast says • the probability that it will rain on Monday is 0.55 and • the probability that it will rain on Tuesday is 0.25. Ella draws a tree diag

  7. Q6

    June 2019 · Paper 6

    4 marksP4 Probabilities that sum to 1R5 Sharing in a ratio
    The whole paper ↗
    June 2019 Paper 6, question 6: A bag contains some counters. • There are 300 counters in the bag. • There are only red, white and blue counters in the bag. 23 . • The probability of picking a

  8. Q3

    November 2018 · Paper 5

    3 marksP7 Sample spacesP4 Probabilities that sum to 1
    The whole paper ↗
    November 2018 Paper 5, question 3: Geoff has two fair spinners. 1 7 2 3 9 5 4 Spinner A Spinner B He spins both spinners and multiplies the numbers on each spinner. (a) Complete the table. Spinne

  9. Q5

    June 2018 · Paper 5

    5 marksP4 Probabilities that sum to 1P3 Relative frequency
    The whole paper ↗
    June 2018 Paper 5, question 5: The table shows the relative frequencies of the results for a football team after a number of games. Result of game won lost drew Relative frequency 0.2 0.45 (a

  10. Q6

    June 2017 · Paper 6

    7 marksP7 Sample spacesP4 Probabilities that sum to 1
    The whole paper ↗
    June 2017 Paper 6, question 6: (a) This is a fair 5-sided spinner. 1 2 2 4 3 Ciara spins the spinner twice and records the product of the two scores. (i) Complete the table. First spin x 1 2
All 10 questions on Probabilities that sum to 1, as a list
  1. November 2024, Paper 5, Q6 (2 marks): Jack has ten cards numbered 11 to 20. He picks a card at random. Jack says, In these ten cards, there are two multiples of 5 and five even numbers. Therefore, t
  2. November 2022, Paper 6, Q4 (6 marks): Sam and Taylor are playing a game against a computer. They can win, draw or lose the game. Sam says I think the probability of us winning the game is 0.3. Taylo
  3. June 2022, Paper 5, Q6 (6 marks): Morgan is playing a computer game. They can score 0, 1, 2 or 3 points on each turn. They record their scores for 100 turns. The table shows the relative frequen
  4. June 2022, Paper 5, Q8 (5 marks): A bag only contains red marbles, blue marbles and yellow marbles. 2 . • The probability of picking a red marble is 5 • There are nine yellow marbles. • The prob
  5. November 2020, Paper 5, Q4 (5 marks): Dora has the following number cards. 2 2 3 5 6 She takes a card at random, replaces the card and then takes a second card. She adds the numbers on the two cards
  6. November 2020, Paper 5, Q8 (3 marks): A weather forecast says • the probability that it will rain on Monday is 0.55 and • the probability that it will rain on Tuesday is 0.25. Ella draws a tree diag
  7. June 2019, Paper 6, Q6 (4 marks): A bag contains some counters. • There are 300 counters in the bag. • There are only red, white and blue counters in the bag. 23 . • The probability of picking a
  8. November 2018, Paper 5, Q3 (3 marks): Geoff has two fair spinners. 1 7 2 3 9 5 4 Spinner A Spinner B He spins both spinners and multiplies the numbers on each spinner. (a) Complete the table. Spinne
  9. June 2018, Paper 5, Q5 (5 marks): The table shows the relative frequencies of the results for a football team after a number of games. Result of game won lost drew Relative frequency 0.2 0.45 (a
  10. June 2017, Paper 6, Q6 (7 marks): (a) This is a fair 5-sided spinner. 1 2 2 4 3 Ciara spins the spinner twice and records the product of the two scores. (i) Complete the table. First spin x 1 2

Questions, mark schemes and examiner’s reports are © OCR, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Every OCR GCSE Maths paper.

Rather write your answers by hand on iPad? Plumi marks them against the same mark schemes.