Probability Complements

• 1/5

• 2/5

• 3/5

• 5/5

An automobile dealer decides to select a month for its annual sale.  Find the probability that it will not be December.

• 1/12

• 1/6

• 3/4

• 11/12

P(not A) = 
*Remember to simplify.*

• 6/8

• 3/4

• 2/8

• 1/4

The probability of an event NOT happening.

• probability

• complement

• experimental probability

• sample space

What is the probability of not spinning green?

• 0

• 1/4

• 1/2

• 3/4

What is the P( not purple) on this spinner?

• 2/5

• 1/5

• 4/5

• 3/5

Use the spinner to determine the probability of the given event. Find P(blue or yellow)

• 1/4

• 3/4

• 2/4

• 4/4

What is P(not sport)?

• 24/50

• 26/50

• 3/50

• 23/50

What is the complement of a probability of ¾?

• ¼

• ½

• 4/5

• 3/4