for example HH gives 25% evasion and bfly 35% evasion.
If you have them both in your inventory your total evasion= 35% + 25%*65%=51,25%
You can't evade one attack two times obviously (what would that mean) so the probability of evading if you have both Heaven's Halberd and Butterfly is P(Butterfly) + P(Heaven's Halberd) - P(Butterfly and Heaven's Halberd) = 0.35 + 0.25 - 0.35*0.25 = 0.5125.
If I remember correctly evasion stacks but not in real percentage. I mean if you have a passive ability that gives 40% evasion, getting items for another 60% evasion won't make you invulnerable to auto attacks.
Because if you stack evasion on PA, add BKB and satanic, you can solo the other team in their fountain.
Countered by one Mkb :D Hahahaha man its still a 70% chance that you wont get a true strike. 70% of those are gonna have a 51% chance to miss 3 attacks/sec will give you 2,1 hits so 2 hits without Truestrike half of those will miss so in reality you will get 1 normal hit and 1 Mkb hit for every 3 attack to put it simple its still 1/3 more EHP from autos.
If you have a Heaven's Halberd and a Butterfly, you have a 65% chance to be hit and a 35% chance to have an attack miss (Butterfly). Of the 65% of attacks that go through, 25% of that 65% that do hit will miss due to Heaven's Halberd, which is 16.25% of total attacks.
So with a Butterfly and Heaven's Halberd you will have a 35+16.25 = 51.25% chance to dodge all physical attacks.
@krkshka > it's just how to calculating evasion to a hero with 2 items listed (HH, Butterfly)
i know that all evasion item is countered by MKB. But it is a lux item for newbie player (me) :D
but thanks for advice here, that's clear for me now
@OUTRIGHT: What do you mean? The calculations can obviously be extended if you want to have more evasion items, for example if you have 2x Butterfly and 1x Heaven's Halberd then the probability of evading an attack is 0.683125.
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Does item which provide evasion (butterfly and HH) is stack if used together?
Please tell me :D