Probability Complimentary Events Quiz

What are complementary events in probability?

• Events that have no relation to each other

• Events that have the same outcome

• Two events that are mutually exclusive and together cover all possible outcomes.

• Events that are completely independent of each other

If the probability of an event A is 0.3, what is the probability of its complementary event?

• 0.3

• 1.0

• 0.5

• 0.7

If the probability of an event B is 0.6, what is the probability of its complementary event?

• 0.4

• 1.0

• 0.2

• 0.8

If the probability of getting heads in a coin toss is 0.4, what is the probability of getting tails?

• 0.2

• 0.4

• 0.6

• 1.0

In a standard deck of 52 playing cards, what is the probability of drawing a red card? What is the probability of drawing a non-red card?

• 3/4

• 1/3

• 1/4

• 1/2

If the probability of rain on a particular day is 0.7, what is the probability of no rain?

• 0.3

• 0.5

• 0.7

• 1.0

If the probability of winning a game is 0.8, what is the probability of losing?

• 0.2

• 1.0

• 0.5

• 0.3

If the probability of rolling a number less than 4 on a standard six-sided die is 0.5, what is the probability of rolling a 4, 5, or 6?

• 0.25

• 0.75

• 1.0

• 0.5

A clothing store sells shirts, pants, and jackets. What's the complement of randomly selecting an item that is a jacket?

• Selecting a shirt or a jacket

• Not selecting pants

• Not selecting a jacket

• Selecting a jacket

If the probability of getting heads on a coin toss is 0.5, what is the probability of getting tails?

• 0.3

• 0.5

• 0.7

• 1.0