Do HSR stack?

I got a wand+focus with 2 HSR 20%. Do these two stack so you get 40% or is it still 20%?

u get two chances of 20% so u have: a 4% chance of 40% HSR and 36% chance of 20% HSR

^wrong but close

If you have 2 20% HSR or HCT mods, you get:
32% to halve the casting time/halve the recharge time
and a
4% chance to quarter the casting time/quarter the recharge time

Check this post out.
http://www.guildwarsguru.com/forum/s...php?t=10040956

double recharge bonus no longer happens as of quite a while ago. simple answer is, yes they stack.
And yes, even though anyone can post on wiki, this is true... it used to be you could get 2xHRT but not sonce last year sometime.

ok thx a lot for info

lol i think your maths needs improving 32+4 = 36, when it should add up to 40

You get 2 times 20% chances, =40, of them 4% (20% 0f 20%) will overlap = 36% HCT/HSR and 4% QCT/QSR

The update capped it at 50% so 40% speed increase is still possible.

Take your own advice.

They are independant events so the chance of only one going off is (.2*.8)*2 = 0.32 and the chance of both going off is .2*.2 = 0.04
And as someone else stated, there is a cap at 50% so the bottom line is a 36% chance to halve casting time.

This post is incorrect. Please check your work. I know someone else has already linked this, but it bears repeating.
http://www.guildwarsguru.com/forum/s...php?t=10040956
This post details it fully.

im not sure where u get this .8 from

but i cast a skill so i have a 20% chance, it fails or succeeds,

the other mod then triggers, giving me a 20% chance, it too fails or suceeds.

20+20 = 40!

In total u have a 40% chance of 1 or both of them triggering, so take away the 4% chance of them both triggering and u have 36%.

If i have a 20% chance falling over with my left leg, and i have another 20% chance of falling over with my right leg i have a total of 36% chance to falling over with either leg and a 4% chance of falling over with both.

and i have read through the afore mentioned thread and i dont agree with it, i may be wrong but im sure that the calulations are incorrect

Hey! take it easy, it's on a small amount of % for godsake. God! you guys sounded like those kids in the math club back in my high school day.

What are you on? I don't see any difference between soph's post and the thread you link to.

You wanna Start something Etta! *Right here, right now! starts to play* hehe like id ever hurt u were having a nice friendly discussion here.

A= I have 20% chance of a HCT
B= I have 20% chance of a HCT

z:I have A chance of HCT – I have a full 20% chance of HCT

y:Next mod: I have B Chance of HCT – I have another full 20% chance of HCT

x:I have A Union B chance of HCT – I have 40% chance of HCT or QCT total

w:I have A Insection B chance of QCT – I have 4% chance of QCT (the intersection of both Casts triggering)

v: x – w = 36% - I have 36% chance of HCT

The mods trigger separately and independently. You can't just add them together. Imagine if the chance to halve recharge was 60% instead of 20% and you'll see my point.

Here's a question: what's the chance of neither mod working? 64% yeah? Which means at least one mod kicks in 36% of the time.

64% chance of you getting no skill recharge boost
32% chance of you getting half skill recharge
4% chance of you getting quarter skill recharge

nah! just all this number make my head hurt!

The chance of both mods not working is 60%, the chance of just 1 mod not working is 36%.

If i have 3 Red beans in my left hand and i have 3 red beans in my right hand, then i have 6 red beans.

A - I have 3 beans
b - I have 3 beans

I have A union (and) B - I have 6 beans

There is a difference, I assure you. Sophita, I have to disagree with you. The two 20% chances do not add to 40%. I think this is your point of confusion. The simple answer is 2 20% mods stack to 36% chance, because of the 50% cap update. Don't make me show my work!

:/

Forget the union and intersection stuff. I repeat: Imagine if the chance to halve recharge was 60% instead of 20% and you'll see my point.

the answer is plain easy, 2 20% HSR bonusses add up to 36% chance of HSR. Weather or not you understand the maths behind this is irrelivant. The OP asked for an answer, and he got the answer, this is a guild wars forum, not a math discussion.