# Evaluate the Expression

• December 12th 2008, 03:16 PM
BlakeRobertsonMD
Evaluate the Expression
Hey Everyone

Not really sure how I would evaluate these:

10P4
_
P(A) when P(A) = 10/11

and

10C2

Thought i'd shoot them out there and see if anyone could guide me in the right direction.
• December 12th 2008, 03:33 PM
Plato
Quote:

Originally Posted by BlakeRobertsonMD
10P4
_P(A) when P(A) = 10/11 and 10C2

This posting is almost impossible to read (decode).
Here is my take on it.
$_{10} P_4 = \left( {10} \right)\left( 9 \right)\left( 8 \right)\left( 7 \right) = \frac{{10!}}{{\left( {10 - 4} \right)!}}$.

While $_{10} C_2 = \frac{{10!}}{{2!\left( {10 - 2} \right)!}} = \frac{{10 \cdot 9}}{{2 \cdot 1}}$

I must say that I doubt this is your problem.