Use total probability - exam scenario
For a retail analyst, \(P(A)=0.39\), \(P(B|A)=0.68\), and \(P(B|A')=0.2\). Calculate \(P(B)\). Enter the requested value and choose the interpretation that matches the result.
Worked practice: result and interpretation
Calculate the requested result first, then choose the interpretation that follows from it.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.