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91Ó°ÊÓ

Which of the following pairs of events are mutually exclusive? (a) A golfer scoring the lowest 18 -hole round in a 72 hole tournament and losing the tournament. (b) A poker player getting a flush (all cards in the same suit) and 3 of a kind on the same 5 -card hand. (c) A mother giving birth to a baby girl and a set of twin daughters on the same day. (d) A chess player losing the last game and winning the match.

Short Answer

Expert verified
The only mutually exclusive pair of events is pair B (A poker player getting a flush and 3 of a kind on the same 5 -card hand). The other pairs (A, C, D) are not mutually exclusive.

Step by step solution

01

Evaluate Pair A

A golfer scoring the lowest 18 -hole round in a 72 hole tournament does not prevent them from potentially losing the tournament because the total score is calculated based on the combined score of all the rounds. Hence, these two events are not mutually exclusive.
02

Evaluate Pair B

A poker player cannot have a flush (all cards in the same suit) and 3 of a kind (three cards of the same number) in the same 5-card hand. Therefore, these two events are mutually exclusive.
03

Evaluate Pair C

A mother giving birth to a baby girl does not prevent the possibility of also giving birth to a set of twin daughters on the same day, especially in the case of multiple births. Therefore, these two events are not mutually exclusive.
04

Evaluate Pair D

A chess player losing the last game does not necessarily lead to the loss of the match, as the result depends on the earlier games. Therefore, these two events are not mutually exclusive.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Mutually Exclusive Events
When discussing mutually exclusive events, it means that the occurrence of one event makes the other impossible. It's like trying to be in two places at once – it just can't happen! In probability, these events cannot occur simultaneously. Let's take an example from the exercise: Can you have a flush and three of a kind in a 5-card poker hand at the same time? Nope, you can't, because having a flush means all cards must be the same suit, while three of a kind requires three cards of the same rank. This makes them mutually exclusive.
  • If Event A happens, Event B cannot happen at the same time.
  • The probability of both occurring is zero: \( P(A \cap B) = 0 \).
Understanding mutually exclusive events is helpful in predicting outcomes and making strategic decisions, such as game strategies or risk management.
Combinatorial Analysis
Combinatorial analysis is like the math version of organizing your closet. It's all about counting arrangements or combinations of objects without having to actually list them all. This concept is essential when figuring out probabilities in card games like poker.
For instance, determining the probability of certain hands can be calculated using combinatorial techniques. A 5-card hand from a standard deck can vary significantly. Just imagine calculating the number of ways to get a flush versus three of a kind – combinatorial analysis makes this manageable.
  • It helps in determining possible outcomes without listing each one.
  • Uses mathematical formulas for efficiency.
In essence, it provides a simplified approach to complex probability problems, making them more approachable for anyone trying to understand probability and statistics.
Event Evaluation
Evaluating events in probability is crucial. It involves understanding the nature of events and their relationships to make calculations easier. Consider the example of a chess player in the exercise. Losing a game doesn't necessarily mean the entire match is lost, as it's the series of games that determines the match outcome.
To evaluate events effectively:
  • Determine if events are independent, dependent, or mutually exclusive.
  • Assess if one event affects the probability of another.
Event evaluation helps in clarifying situations, ensuring a more strategic approach to predicting probabilities. It enables a better assessment of risk and chance in various scenarios, from games to everyday decisions, enhancing decision-making skills.

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