Complimentary Events

What is the symbol for the complementary event of event A

• A

• 2A

• A'

• A²

The complement of rolling a 3 is:

• Rolling an odd number

• Not rolling a 3

• Rolling an even number

What is the complement to: rolling an even number

• Not rolling an even number (rolling an odd number)

• rolling a 2,4,6

• Rolling a number less than 4

If there is a 70% chance of rain, what is the probability that it will NOT rain?

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

Find P (not A)

Mathematical Equivalence

ON

What do the probabilities of complementary events add up to?

The probability of event A is 0.3. What is the probability of event A'?