Math Notes Q4 U1

Page 1

Lesson 1

Sample Space- All possible outcomes, Example: {possible outcome 1, possible outcome 2} or {P1, P2}

P = Probability, Example P(P1) = probability of possible outcome 1 = 1/2 (outcome over total possible outcomes), P(not P1) = P(T/every other possible outcome) = 1/2

Lesson 2

Union- All of the elements of two or more in a set, U = Union = or, P(P1UP2) = Probability of the outcome of either P1 happening OR P2

Intersection- All of the elements that two or more sets have in common (n) = upside down U

Complement- All of the elements that are not in a set, ' = Complement = chance of that outcome not happening

Lesson 3

Conditional Probability- The probability that one event occurs given another event has already occurred, | = given that _____

Conditional Probability Formula: P(A|B) = P(AnB)/P(B)