Math Problem Statement

A 13 card hand is dealt from a well-shuffled standard 52-card deck. What is the probability that 3 red cards and 10 black cards are dealt? 0.0227

0.0717

0.0217

0.0517

0.0817

None of the above.

Solution

To solve this, let’s break it down step-by-step.

  1. Identify Total Possible Hands:

    • A 13-card hand is dealt from a standard 52-card deck.
    • The number of ways to choose any 13 cards from 52 is: (5213)\binom{52}{13}
  2. Specific Favorable Hands:

    • We need exactly 3 red cards and 10 black cards in the hand.

    • There are 26 red cards and 26 black cards in the deck.

    • The number of ways to choose 3 red cards from 26 red cards is: (263)\binom{26}{3}

    • The number of ways to choose 10 black cards from 26 black cards is: (2610)\binom{26}{10}

    • Therefore, the total number of favorable hands is: (263)×(2610)\binom{26}{3} \times \binom{26}{10}

  3. Calculate the Probability:

    • The probability of getting exactly 3 red cards and 10 black cards is the ratio of the favorable hands to the total possible hands: (263)×(2610)(5213)\frac{\binom{26}{3} \times \binom{26}{10}}{\binom{52}{13}}

Now, let’s compute this:

  • (263)=2600\binom{26}{3} = 2600
  • (2610)=5311735\binom{26}{10} = 5311735
  • (5213)=635,013,559,600\binom{52}{13} = 635,013,559,600

So, Probability=2600×5311735635013559600=138104110006350135596000.0217\text{Probability} = \frac{2600 \times 5311735}{635013559600} = \frac{13810411000}{635013559600} \approx 0.0217

Answer

The probability is approximately 0.0217, so the correct answer is: 0.0217

Would you like more details or have any questions?


  1. What is the probability of getting 5 red and 8 black cards?
  2. How does the probability change if we draw 10 cards instead of 13?
  3. What’s the probability of getting only red cards in a 13-card hand?
  4. How many ways are there to draw 3 red and 10 black cards?
  5. How would the solution change for a deck with jokers?

Tip: Using combinations simplifies probability calculations for card draws without replacement.

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Math Problem Analysis

Mathematical Concepts

Probability
Combinatorics

Formulas

Combination formula: \( \binom{n}{k} = \frac{n!}{k!(n-k)!} \)
Probability formula: \( P = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}} \)

Theorems

Basic Counting Principle
Probability of an Event

Suitable Grade Level

Grade 11-12