IGCSE Maths / Probability

Multiplying independent probabilities

Edexcel International GCSE Maths (4MA1), chapter 20: Probability, specification point 6.3b. Part of the full course.

Read the revision notes · IGCSE Maths past papers

For independent events, the probability that both happen is found by multiplying their probabilities. Knowing when events are independent, and choosing between multiplying for and and adding for or, helps you avoid answers that cannot make sense.

More lessons in Probability

• The language of probability and the probability scale
• Listing outcomes systematically
• Theoretical probability and sample space
• Relative frequency and mutually exclusive events
• Expected frequency and relative frequency
• At least one, and the complement
• Tree diagrams with replacement
• Tree diagrams without replacement
• Three stage tree diagrams
• Probability problem solving
• Conditional probability from a two way table
• Conditional probability from a Venn diagram
• Conditional probability without replacement
• Forming an equation from a probability