A standard deck of 52 playing cards contains four of each numbered card 2-10 and four each of aces, kings, queens, and jacks. Two cards are chosen from the deck at random.

Which expression represents the probability of drawing a king and a queen?

A. [tex]$\frac{\left({ }_4 P_1\right)\left({ }_3 P_1\right)}{{ }_{52} P_2}$[/tex]

B. [tex]$\frac{\left({ }_4 C_1\right)\left({ }_3 C_1\right)}{{ }_{52} C_2}$[/tex]

C. [tex]$\frac{\left({ }_4 P_1\right)\left({ }_4 P_1\right)}{{ }_{52} P_2}$[/tex]

D. [tex]$\frac{\left({ }_4 C_1\right)\left({ }_4 C_1\right)}{{ }_{52} C_2}$[/tex]



Answer :

Let's solve this problem step by step:

1. Identify the Problem:
We are asked to determine the probability of drawing one king and one queen from a standard deck of 52 cards.

2. Total Possible Combinations:
We need to find the total number of ways to choose 2 cards out of the 52-card deck. This can be calculated using combinations since the order of selecting the cards does not matter.
[tex]\[ \binom{52}{2} \][/tex]
From the provided answer, we know:
[tex]\[ \binom{52}{2} = 1326 \][/tex]

3. Number of Ways to Choose 1 King:
There are 4 kings in the deck, and we need to choose 1 of them. This is again a combination:
[tex]\[ \binom{4}{1} \][/tex]
From the provided answer, we know:
[tex]\[ \binom{4}{1} = 4 \][/tex]

4. Number of Ways to Choose 1 Queen:
Similarly, there are 4 queens in the deck, and we need to choose 1 of them.
[tex]\[ \binom{4}{1} \][/tex]
From the provided answer, we know:
[tex]\[ \binom{4}{1} = 4 \][/tex]

5. Total Number of Favorable Combinations:
To get one king and one queen, we multiply the number of ways to choose one king by the number of ways to choose one queen:
[tex]\[ 4 \times 4 = 16 \][/tex]

6. Calculate the Probability:
The probability is the number of favorable outcomes divided by the total number of possible outcomes:
[tex]\[ \frac{16}{1326} \][/tex]
From the provided answer, we know:
[tex]\[ \frac{16}{1326} \approx 0.012066 \][/tex]

Given options are listed in a problems statement, we can see that:
- The first and third options use permutations, which are incorrect because the order doesn't matter.
- The second option appears to be correct since it uses combinations correctly:
[tex]\[ \frac{\binom{4}{1} \binom{4}{1}}{\binom{52}{2}} \][/tex]
- The last option is malformed with unstructured dot, so it cannot be correct.

Therefore, the correct expression representing the probability of drawing a king and a queen is:
[tex]\[ \frac{\left({ }_4 C_1\right)\left({ }_4 C_1\right)}{{}_{52} C_2} \][/tex]
Which confirms that the correct option is:
[tex]\[ \boxed{\frac{\left({ }_4 C_1\right)\left({ }_4 C_1\right)}{{ }_{52} C_2}} \][/tex]