PROBABILITY COTRONEO ALESSIA, NOTARANGELO CHIARA, GALLO GIOVANNI, FILICE DAVIDE

PROBABILITY PROBABILITY is the ratio between a confirmed event and a

possible event

But this definition has got two disadvantages

All the events must have the same probability of happening

It presumes a finished number of possible cases

∞∞

EVENTS CATEGORISATION

0

impossible event

1/2 1

Sure event

Less probable event

Very probable event

Independent events

dependent Events

EVENTS

When the happening of one event does not modify the probability of the other event

When the happening of one event modifies the probability of the other event

EXAMPLES OF …

INDEPENDENT EVENTS

Probability of picking a king from a deck of cards

Probability of picking a blue marble inside a bag full of marbles

DEPENDENT EVENTS

Probability of picking a king from a deck of cards

Probability of picking an ace from the same deck

THE THREE DOORS GAME