ISP W3 - Complement Rule Practice

If there is a 30% chance for rain, then there is a 70% chance that it will not rain. What rule in probability does the 70% conclusion represent?

• Probability Assignment Rule

• Disjoint Rule

• Subtraction Rule

• Complement Rule

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%

The probability that a randomly chosen American is a Republican is 0.35. What is the probability that a randomly chosen American is not Republican?

• 0.35

• 0.65

• 0.75

• 0.50

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 

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

• 6/8
• 3/4
• 2/8
• 1/4