A ball is drawn from an urn containing 3 white and 3 black...

A ball is drawn from an urn containing 3 white and
3 black balls. After the ball is drawn, it is replaced and another ball is drawn. This process goes on indefinitely. What is the probability that, of the first 4 balls drawn, exactly 2 are white?

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Key Concepts

Combinatorics

This concept involves counting the number of different ways events can occur. In the context of a binomial experiment, combinations are used to determine the number of ways to achieve exactly a certain number of successes (e.g., exactly two white balls) in a fixed number of trials, without considering the order of success.

Binomial Distribution

This concept refers to the probability distribution that models the number of successes in a fixed number of independent trials, each with the same probability of success. It is applicable in scenarios where each trial is independent, and each outcome (success or failure) has a constant probability, such as drawing a ball with replacement from an urn.

Independent Trials

This concept highlights that the outcome of one experiment does not affect the outcome of another. When a drawn ball is replaced before the next draw, each draw happens independently, ensuring that the probability of drawing a white or black ball remains constant throughout the trials.

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