What Is Probability?

$\frac{12\times 1\times 2\times 72 \times {93 \choose 2}}{{98 \choose 7}}$

$\frac{12\times 1\times 2\times 2}{{98 \choose 7}}$

$\frac{12\times 1\times 2\times 36 \times {93 \choose 2}}{{98 \choose 7}}$

$\frac{12\times 1\times 2\times 18 \times 2}{{98 \choose 7}}$