Calculating Probability of Disjoint Events: The Addition Rule

This video tutorial explains how to calculate the probability of disjoint events using the addition rule. It introduces key terms like 'event' and 'disjoint', and provides examples using dice and cards to illustrate the concept. The lesson emphasizes the importance of identifying disjoint events and applying the addition rule correctly. It concludes with a recap of the key points covered.

What does it mean for two events to be disjoint?

• They cannot occur at the same time.

• They can occur at the same time.

• They are always independent.

• They are always dependent.

Which rule is used to calculate the probability of disjoint events?

• Division rule

• Addition rule

• Subtraction rule

• Multiplication rule

What is the probability of rolling a 3 or 5 on a six-sided die?

• 1/4

• 1/2

• 1/3

• 1/6

What is the probability of rolling a 3 on a six-sided die?

• 1/4

• 1/2

• 1/3

• 1/6

Why can't we simply add the probabilities of drawing a Jack or a red card from a deck?

• Because the probabilities are equal.

• Because the deck is incomplete.

• Because they are not disjoint events.

• Because they are disjoint events.

In the duck problem, what is the probability of drawing a red or yellow duck?

• 5/12

• 1/4

• 1/3

• 1/2

Which of the following is an example of non-disjoint events?

• Having green or blue eyes

• Rolling a 3 or 5 on a die

• Drawing a Jack or a red card

• Flipping heads or tails on a coin