10.3

What is the complement of flipping a coin 20 times and landing on heads 11 times?

• P' = 1/10

• P' = 11/20

• P' = 9/20

• P' = 10/20

What is the complement of it snowing 3 days out of the week?

• P' = 4/7

• P' = 2/7

• P' = 5/7

• P' = 3/7

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

The probability of it raining today is 30%.  What is the probability that it will NOT rain?

• 30%
• 70%
• 100%
• 0%

What is the probability of getting any letter that is not A?

• 6/8
• 3/4
• 2/8
• 1/4

If a coin has 0.6 probability coming up tails, the probability that it comes up heads is

• 0.5 
• -0.2 
• 0.4
• 0.6 

A day of the week is chosen at random. What is the probability of choosing a Monday or Tuesday?

• 1/7

• 2/14

• 2/7

• None of the above

A single 6-sided die is rolled. What is the probability of rolling a 2 or a 5?

• 1/3

• 2/3

• 1/2

• None of the above

A single 6-sided die is rolled. What is the probability of rolling a number greater than 3 or an even number?

• 1

• 2/3

• 5/6

• None of the above

Probability is ...

• the chance that some event will occur.
• a game that involves coins.
• a guarantee.