Complementary Probability

The sum of the probabilities of ______ is 1.

• Independent Events

• Simple Events

• Complementary Events

• Experimental Events

If the probability of an event B is 0.6, what is the probability of its complementary event?

• 0.4

• 1.0

• 0.2

• 0.8

What's the probability of the complement of spinning on black as a fraction?

• 1/4

• 7/8

• 8/8

• 1/8

The probability of an event NOT occurring.

• Probability

• Sample Space

• Liklihood

• Complement

How likely are you to NOT roll a 1 on a regular die? (Complement)

• P' = 2/6

• P' = 3/6

• P' = 5/6

• P' = 1/6

Event A has a probability of 0.3. What is the probability of the complement of Event A?

• 30%

• 3/100

• 7/100

• 0.7

If 33% of the students at Harnett Central have a pet, then what is the probability of the complement of this event?

• 33%

• 77%

• 67%

• 50%

​ (a)   are two events that together contain all of the outcomes in the sample space.

• equally likely

• simple event

• Experiment

• outcome

• Complementary Events

• probability

P(not A) = 
*Remember to simplify.*

• 6/8

• 3/4

• 2/8

• 1/4

P(not A) = 
*Remember to simplify.*

• 6/8

• 3/4

• 2/8

• 1/4