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If you draw a card at random from a well-shuffled deck, is getting an ace independent of the suit? Explain.

Short Answer

Expert verified
Yes, getting an ace is independent of the suit.

Step by step solution

01

Determine the Probability of Getting an Ace

There are 4 aces in a standard deck of 52 cards. Therefore, the probability of drawing an ace from the deck is: \( P( ext{Ace}) = \frac{4}{52} = \frac{1}{13} \).
02

Determine the Probability of Getting a Specific Suit

There are 4 suits (hearts, diamonds, clubs, spades) in a deck, each containing 13 cards. The probability of drawing a card of a specific suit is: \( P( ext{Suit}) = \frac{13}{52} = \frac{1}{4} \).
03

Determine the Probability of Getting an Ace in a Specific Suit

Since there is only one ace in each suit, the probability of drawing the ace of any specific suit (e.g., ace of hearts) is \( P( ext{Ace} ext{ and Suit}) = \frac{1}{52} \).
04

Check for Independence

Two events, A and B, are said to be independent if \( P(A ext{ and } B) = P(A) \times P(B) \). Check if the events 'getting an ace' and 'getting a specific suit' are independent: \[ P( ext{Ace} ext{ and Suit}) = \frac{1}{52} \] \[ P( ext{Ace}) \times P( ext{Suit}) = \frac{1}{13} \times \frac{1}{4} = \frac{1}{52} \] Since \( P( ext{Ace} ext{ and Suit}) = P( ext{Ace}) \times P( ext{Suit}) \), the events are independent.

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Key Concepts

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

Independence of Events
Understanding the independence of events is essential when dealing with probability. In simple terms, two events are independent if the occurrence of one event does not affect the occurrence of another. For example, when you draw a card from a well-shuffled deck, the question is whether drawing an ace is independent of the suit of the card. For two events, say Event A and Event B, to be independent, the probability of both A and B occurring at the same time must equal the product of their individual probabilities:
  • If Event A is drawing an ace, then the probability is \(P(\text{Ace}) = \frac{1}{13}\).
  • If Event B is drawing a card of a specific suit like hearts, then the probability is \(P(\text{Suit}) = \frac{1}{4}\).
The probability of drawing an ace of hearts is \(P(\text{Ace and Suit}) = \frac{1}{52}\). This equals \(P(\text{Ace}) \times P(\text{Suit})\), which confirms that drawing an ace is indeed independent of the suit. When you multiply individual probabilities for independent events, you should arrive at the combined probability. This concept helps in breaking complex situations into more manageable calculations.
Card Drawing
Drawing a card involves selecting a card from a deck, usually randomly. Drawing cards is a common way to teach probability because it carries with it clear probabilities that can easily be calculated and verified. When you draw a single card, you are performing a simple random experiment. Each card draw is independent and does not affect subsequent draws, assuming the deck is shuffled after each draw.Several key points to consider when drawing a card from a deck include:
  • Each draw involves the possibility of one of 52 outcomes since a standard deck consists of 52 cards.
  • The chance of drawing any type of card, like a face card or an ace, is listed as a fraction of the total deck.
Success in understanding card probabilities involves assessing and calculating the desired outcomes from the total possible. For instance, for determining the probability of one specific card like the ace of spades, the calculation would be \(\frac{1}{52}\). Conveying these probabilities in practice helps reinforce the understanding of random experiments.
Standard Deck of Cards
A standard deck of cards is a common tool used in probability exercises due to its fixed nature with well-defined properties. Typically, a deck has 52 cards, divided into four suits: hearts, diamonds, clubs, and spades. Each suit contains 13 cards, numbered from 2 to 10, and includes three face cards (jack, queen, king) and an ace. Key components of a standard deck important for probability calculations include:
  • Equal distribution of suits, with 13 cards in each suit.
  • Specific types of cards, like four aces across the four suits, making it straightforward to compute the odds for drawing such cards.
  • Balanced assortment of higher-value and lower-value cards, allowing for varied probability questions.
These characteristics allow for a multitude of scenarios to evaluate in probability exercises. Understanding these components aids in evaluating probabilities of drawing certain cards or combinations, illustrating key probability concepts like independence and dependent events combinations.

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Most popular questions from this chapter

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