- Always simplify fractions - write 1/2 instead of 3/6
- Check your answer makes sense - probability cannot be negative or greater than 1
- Read the question carefully - "at least one" is different from "exactly one"
- Use clear notation - write P(A) for "probability of event A"
- Show your working - write the fraction before converting to decimal
- Be careful with units - some questions want decimals, others want percentages or fractions
This exam tips covers Exam Tips within Basic Probability for GCSE Mathematics. Revise Basic Probability in Probability for GCSE Mathematics with 13 exam-style questions and 20 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 5 of 7 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Practice questions for Basic Probability
Which value represents an impossible event on a probability scale?
Explain what is meant by theoretical probability and state the formula used to calculate it.
Quick recall flashcards
What is probability?
A measure of how likely an event is to occur, expressed as a number between 0 and 1
Can probability be negative?
No, probability must be between 0 and 1