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.
Exam Tips
- 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
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