3.3 Compound Events

Question 1

Union

Answer 1

two events in the event consisting of all outcomes that are contained in either of two events denoted E1 or E2

Question 2

Intersection

Answer 2

two events in the event consisting of all outcomes that contained in both of two events E1 and E2

Question 3

Mutually Exclusive Events

Answer 3

two events that have no outcomes in common, cannot occur simultaneously, P=(A U B) is P(A) + P(B)

Question 4

Non mutually exclusive events

Answer 4

When finding the union you need to not count the shared outcomes more than once,
P(A or B)= P(A)+P(B)-P(A and B)

Question 5

Finding a union (addition rule)

Answer 5

P(A U B)= P(B)+P(A)-P(A n B)
If events are mutually exclusive,
P(A U B)= P(B)+P(A)