2016 AMC 10A Problems/Problem 1
Problem
What is the value of 
?
Solution
Factoring out the 
from the numerator and cancelling out the 
s in the numerator and denominator, we have: ![\[\frac{11!-10!}{9!} = \frac{9!(10 \cdot 11 -10)}{9!} = 10 \cdot 11 - 10 =\boxed{\textbf{(B)}\;100.}\]](http://latex.artofproblemsolving.com/1/a/4/1a461813226c67877e8d0b9fc7186a4622efeb10.png)
See Also
| 2016 AMC 10A (Problems • Answer Key • Resources) | ||
| Preceded by First Problem |
Followed by Problem 2 | |
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| All AMC 10 Problems and Solutions | ||
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