 A simple

event is one event.

 A compound

event is an event that
consists of two or more simple
events.
 Two

events that cannot occur at the
same time are called mutually
exclusive.

 If

events can overlap they are
inclusive.
 Mutually
 P(A or B)

Exclusive:
= P(A) + P(B)

 Inclusive:
 P(A or B) =

 P(A and

P(A) + P(B) – P(A and B)

B) = probability that both
things will happen
 A card

is randomly selected from a
standard 52-card deck. What is the
probability that it is an ace or a face
card?
 You

roll a six-sided die. What is the
probability of rolling a multiple of 3
or 5?
 You

roll a six-sided die. What is the
probability of rolling an even
number or a 3?
 A card

is randomly selected from a
standard deck. What is the
probability it is a heart or face card?
 You

roll a six-sided die. What is the
probability of rolling a multiple of 3
or a multiple of 2?
 You

roll a six-sided die. What is the
probability of rolling an odd number
or a multiple of 3?

4.4 probability of compound events

  • 2.
     A simple eventis one event.  A compound event is an event that consists of two or more simple events.
  • 3.
     Two events thatcannot occur at the same time are called mutually exclusive.  If events can overlap they are inclusive.
  • 4.
     Mutually  P(Aor B) Exclusive: = P(A) + P(B)  Inclusive:  P(A or B) =  P(A and P(A) + P(B) – P(A and B) B) = probability that both things will happen
  • 5.
     A card israndomly selected from a standard 52-card deck. What is the probability that it is an ace or a face card?
  • 6.
     You roll asix-sided die. What is the probability of rolling a multiple of 3 or 5?
  • 7.
     You roll asix-sided die. What is the probability of rolling an even number or a 3?
  • 8.
     A card israndomly selected from a standard deck. What is the probability it is a heart or face card?
  • 9.
     You roll asix-sided die. What is the probability of rolling a multiple of 3 or a multiple of 2?
  • 10.
     You roll asix-sided die. What is the probability of rolling an odd number or a multiple of 3?