Update solution.md

Author: AJaccP

src/content/questions/comp2804/2017-fall-final/22/solution.md

@@ -8,7 +8,7 @@ No die is greater than the other when the dice rolls are the same
 
 The probability of returning k or having 2 different rolls is $ \frac{30}{36} $
 
-On Allah, I swear there's a rule that states that we expect to need 1/p attempts until the thing actually happens? Geometric Distribution?
+Geometric distribution rule states that the expected value is 1/p, where p = probability of the event. 
 
 $ p = \frac{30}{36} $