Question

Evaluate $^{12}C_{2}$.

• A. $66$
• B. $65$
• C. $60$
• D. $64$

Answer 1

Answer: (A)

$^{12}C_{2} = \frac{12!}{\left(10\right)! 2!} \frac{ 12 \times 11 \times\left(10!\right)}{\left(10!\right)\times2}=6\times11 =66$