تعريف الحدث المكمل والفرق بين حدثين

The video tutorial introduces the concept of complementary events in probability. It explains that an event is a subset of a sample space, providing examples such as rolling a die or flipping a coin. The complementary event is defined as the non-occurrence of the original event. The tutorial emphasizes that the sum of the probabilities of an event and its complement equals one, illustrating this with examples. This fundamental concept helps in understanding the binary nature of events in probability, where an event either occurs or does not.

What is an example of an event in probability?

• Walking in the park

• Reading a book

• Rolling a die and getting a four

• The sun rising in the east

What does a complementary event represent?

• The event happening in the future

• The event happening twice

• The non-occurrence of the event

• The occurrence of the event

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

• 1.0

• 0.3

• 0.5

• 0.7

Which of the following statements is true about complementary events?

• Their probabilities add up to less than one

• Their probabilities add up to more than one

• Their probabilities are always equal

• Their probabilities add up to exactly one

What happens when you add the probability of an event and its complementary event?

• The result is zero

• The result is one

• The result is two

• The result is unpredictable