Actually it should give HK's equal to the level of PK points of the slain, whichever lower, divided by the amount of people involved in killing him. These are not awarded until after looting, however, so you would need to include a screenshot of the conclusion of looting. You should get a message that tells you then how many points you got or if none were awarded.
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Computing the probability that at least one of the following events will occur:
P(a or b ... or z) = 1  P(!a and !b ... and !z)
Probability
