4.1.1 - Definition
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Practice Questions
Test your understanding with targeted questions
Define conditional probability in your own words.
💡 Hint: Think of it as narrowing down the possibilities.
What does the formula P(A|B) represent?
💡 Hint: Focus on the relationships between the events.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does P(A|B) represent?
💡 Hint: Think about how one event affects the other.
True or False: If P(B) = 0, we can calculate P(A|B).
💡 Hint: Consider the implications of dividing by zero.
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Challenge Problems
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A medical test has a 95% accuracy for a disease found in 1% of the population. If someone tests positive, what is the probability they actually have the disease?
💡 Hint: Break it down step by step using provided formulas.
In a factory, 70% of incidents are due to machinery failure, 10% due to human error, and 20% due to external factors. If an incident occurs, what is the probability it was due to machinery failure?
💡 Hint: Consider the weighting of each factor when calculating probability across all incidents.
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