The video explains the classical approach to calculating probability, emphasizing the need for equally likely outcomes. It demonstrates this approach with examples, such as flipping a coin and determining the probability of having two boys in a family of three children. The video highlights the importance of defining a sample space and counting the number of favorable outcomes to calculate probabilities accurately.

What is a key requirement for using the classical approach to probability?

• The events must be independent.

• The sample space must be infinite.

• The outcomes must be mutually exclusive.

• All outcomes must be equally likely.

What does the classical approach to probability involve?

• Considering only independent events.

• Applying complex mathematical formulas.

• Using historical data to predict future events.

• Calculating the ratio of favorable outcomes to total outcomes.

How do you determine the probability of an event using the classical approach?

• By multiplying the probabilities of individual events.

• By adding the probabilities of all possible outcomes.

• By subtracting the probability of the complementary event.

• By dividing the number of favorable outcomes by the total number of outcomes.

In the example of flipping a coin, what is the probability of getting a head?

• 0.5

• 0.25

• 1.0

• 0.75

What is the sample space for flipping a fair coin?

• {Head, Head}

• {Head, Tail}

• {Head, Tail, Edge}

• {Tail, Tail}

What is the probability of getting a tail when flipping a fair coin?

• 1.0

• 0.75

• 0.25

• 0.5

Why can't the classical approach be used if a coin is weighted?

• Because the events are not independent.

• Because the sample space changes.

• Because the outcomes are mutually exclusive.

• Because the outcomes are not equally likely.

In the example of a family with three children, how many possible outcomes are there?

• 8

• 4

• 6

• 10

What is the probability of a family having exactly two boys out of three children?

• 0.375

• 0.625

• 0.25

• 0.5

How many outcomes in the sample space have exactly two boys?

• 5

• 2

• 3

• 4