1. **State the problem:** Calculate the value of $\frac{{24C2 \times 24C2}}{{52C4}}$ where $nCr$ denotes the combination formula $\binom{n}{r}$.
2. **Recall the combination formula:**
$$\binom{n}{r} = \frac{n!}{r!(n-r)!}$$
This formula gives the number of ways to choose $r$ items from $n$ without regard to order.
3. **Calculate each combination:**
$$24C2 = \binom{24}{2} = \frac{24!}{2! \times 22!} = \frac{24 \times 23}{2} = 276$$
4. **Calculate $52C4$:**
$$52C4 = \binom{52}{4} = \frac{52!}{4! \times 48!} = \frac{52 \times 51 \times 50 \times 49}{4 \times 3 \times 2 \times 1}$$
Calculate numerator:
$$52 \times 51 = 2652$$
$$2652 \times 50 = 132600$$
$$132600 \times 49 = 6497400$$
Calculate denominator:
$$4 \times 3 \times 2 \times 1 = 24$$
So,
$$52C4 = \frac{6497400}{24} = 270725$$
5. **Substitute values into the original expression:**
$$\frac{24C2 \times 24C2}{52C4} = \frac{276 \times 276}{270725} = \frac{76176}{270725}$$
6. **Simplify the fraction if possible:**
Check for common factors; 76176 and 270725 share no obvious common factors, so the fraction is simplified.
**Final answer:**
$$\frac{24C2 \times 24C2}{52C4} = \frac{76176}{270725} \approx 0.2813$$
Combination Expression 8A90B8
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