Probability (OCR GCSE Maths): Flashcards

Likelihood or chance of something happening

A situation where we observe or measure an event

Possible results of an experiment

Specific outcome we are interested in

$P(E) = \frac{\text{favourable}}{\text{total}}$

$1$ (certain to happen)

$0$ (impossible)

Add the probabilities

Multiply the probabilities

$P(\text{Not A}) = 1 - P(A)$

Or, Either (mutually exclusive)

And, Both, Together (independent)