GCSE Maths
GCSE Maths Probability Equation Questions Exam Questions
Free GCSE Maths exam questions on Probability Equation Questions, with full model answers. Covers forming and solving equations from probability problems.
Probability Equation Questions exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
About GCSE Maths Probability Equation Questions
Probability Equation Questions is a Grade 8/9+ GCSE Maths topic, so it mostly comes up on Higher tier papers. These questions suit every major board: AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge IGCSE, Edexcel IGCSE and OxfordAQA IGCSE. Work through the pack without notes, then mark every answer against the model answers and redo any you got wrong a few days later.
What you need to know
- Setting up Use n for unknown counts.
- Without replacement n/(n + k) x (n − 1)/(n + k − 1).
- Solving Usually a quadratic.
Common mistakes in Probability Equation Questions
- Not reducing totals.
- Not rejecting invalid solutions.
Try two Probability Equation Questions exam-style questions
1. A bag has n red and 3 blue. What is P(red) in terms of n? (1 mark)
Show the mark scheme answer
n/(n + 3)
2. Why reject a negative n? (1 mark)
Show the mark scheme answer
Counts cannot be negative
Probability Equation Questions FAQs
Which exam boards include Probability Equation Questions?
These questions suit every major board: AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge IGCSE, Edexcel IGCSE and OxfordAQA IGCSE.
What grade is Probability Equation Questions in GCSE Maths?
It is a Grade 8/9+ topic, so it mostly appears on Higher tier papers.
How should I use these Probability Equation Questions questions?
Answer every question without notes, then check each answer against the model answers and redo the ones you got wrong.
