Complementary Events

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

• Not possible

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

What is the complement to tossing a coin and it landing on tails?

What is the symbol for the complementary event of event A

• A

• 2A

• A'

• A²

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'?

Pr⁡(A) + Pr⁡(A′) = 1

• True

• False

Pr(A') = 0.35

What is P(A)?