Questions: In a 2-card hand, what is the probability of holding 2 cards of the same suit? Round your answer to three decimal places as needed.
A. 0.164
B. 0.200
C. 0.235
D. 0.118
Transcript text: In a 2-card hand, what is the probability of holding 2 cards of the same suit? Round your answer to three decimal places as needed.
A. 0.164
B. 0.200
C. 0.235
D. 0.118
Solution
Solution Steps
Step 1: Calculate the Total Number of Ways to Choose 2 Cards from a Deck of 52 Cards
The total number of ways to choose 2 cards from a deck of 52 cards is given by the combination formula:
\[
\binom{52}{2} = \frac{52!}{2!(52-2)!} = 1326
\]
Step 2: Calculate the Number of Ways to Choose 2 Cards from the Same Suit
There are 4 suits, and each suit has 13 cards. The number of ways to choose 2 cards from the same suit is:
\[
4 \times \binom{13}{2} = 4 \times \frac{13!}{2!(13-2)!} = 4 \times 78 = 312
\]
Step 3: Calculate the Probability of Drawing 2 Cards of the Same Suit
The probability of drawing 2 cards of the same suit is the ratio of the number of favorable outcomes to the total number of outcomes:
\[
\text{Probability} = \frac{312}{1326} \approx 0.2353
\]
Step 4: Round the Probability to Three Decimal Places
Rounding the probability to three decimal places:
\[
\text{Rounded Probability} \approx 0.235
\]
Final Answer
The probability of holding 2 cards of the same suit is approximately \(0.235\). Therefore, the answer is:
\[
\boxed{0.235}
\]
The correct option is C.