I keep getting “Basic probability” questions wrong in Probability. What's the trap?
giving a probability greater than 1.
The usual trap: giving a probability greater than 1. How to avoid it: if you get P > 1, recount the sample space. Go back to the definition — probability = favourable outcomes ÷ total outcomes, always between 0 and 1.
Key point
Basic probability
Common mistake
giving a probability greater than 1.
Memory tip
if you get P > 1, recount the sample space.
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