Probability Rules!

(FAVORABLE OUTCOMES)/(TOTAL OUTCOMES)

P(A GIVEN B)

P(A) + P(B) - P(A AND B)

EQUALLY LIKELY OUTCOMES FORMULA

P(A AND B)

P(E)

PROBABILITY OF AN EVENT

GENERAL ADDITION RULE

PROBABILITY OF AN INTERSECTION

P(A OR B)

P(A) * P(B/A)

P(A AND B)/P(B)

GENERAL MULTIPLICATION RULE

PROBABILITY OF A UNION

CONDITIONAL PROBABILITY

CONDITIONAL PROBABILITY FORMULA