1. ## Evaluate factorial

Evaluate 11!/8!

2. Originally Posted by ccdalamp
Evaluate 11!/8!
Either plug it into a calculator or...

$\frac{11!}{8!} = \frac{11 \cdot 10 \cdot 9 \cdot 8 \cdot 7 ~ ... ~ \cdot 2 \cdot 1}{8 \cdot 7 ~ ... ~ \cdot 2 \cdot 1}$

The 8, 7, 6, 5, 4, 3, 2 and 1 cancel leaving
$\frac{11!}{8!} = 11 \cdot 10 \cdot 9 = 990$

-Dan