Spot the Question Type

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Pattern Recognition

Three CSCA phrases tell you instantly which formula to use.

Phrase ⟶ Formula

Train the reflex

'A and B both'

$P (A \cap B)$

If independent: $P (A) \cdot P (B)$

'A or B'

$P (A \cup B)$

$P (A) + P (B) - P (A \cap B)$

'A given B'

$P (A ∣ B)$

$= \frac{P ( A \cap B )}{P ( B )}$ ← Bayes