More Math Hammer

So, in my drive to work this morning I got to thinking. how would my orks fare against my new plague wing.
SO i thought up the following scenario:

how many basic troops would it take to drop a single model of the opposite army?

So I used Slugga Boyz vs. Plague Marines.
1st up Plague Marines charging a Slugga Boy.
Plague Marine gets 2 swings on the charge and with a higher initiative. 50% of those will hit making 1 hit.
with that 1 hit we have 50% chance to wound making for 0.5 wounds.
with their measely save 16% of those wounds will be saved for a remainder of 0.41 kills.
by that we know that we would need 3 Plague Marines (5 swings) to drop one Ork in one round of close combat. Making 69 points to kill 9 points of orks.

On the flip side:

Orks get to double their initiative with Power of the Waaagh! to 4 on the charge. two attacks base +1 for the charge, +1 for the 2nd cc weapon. however, Plague Marines have blight grenades which negate the charging bonus.
1 Ork gets 3 attacks @ 50% to hit = 1.5 hits
1.5 hits @ 33% to wound = 0.50 wounds
0.50 wounds@ 33% chance to miss the armour save = 0.16 missed saves
0.16 missed saves @ 50% chance on Feel No pain = 0.08 kills.
From this we can determine that we need 36 Ork hits to kill one Plague Marine. This comes to 12 Orks (108 points) to kill 23 points of Plague Marines.

What this works out to is you need 11.99 points of Orks to kill one point of Plague Marines while you only need 2.39 points of Plague Marines to kill one point of Orks

Winner: Plague Marines