Questions about item granted skills

I’m a little confused about how on-attack and on-being hit procs from item skills work.

For example, if I’m wearing one item that has a 15% chance to trigger flame burst when I get hit, and another item that has a 20% to trigger static nova when I get hit, can they both proc at the same time? or do I get a 15% chance for flame burst, 20% chance for static nova and 65% of nothing per hit?

Similarly, can my on attack skills (volcanic wyrm’s breath, “of the arcane blaze” items and so on) proc multiple skills per attack, or can each attack only proc one of them? If the second is true, then would I be correct in saying there is little point in wearing two items with the same proc (two “of the arcane blaze” items for example)?

Thanks for your help

They are independent, both can proc at the same time.

Each item proc activates independently of each other. They can even both activate on the same hit.

Excellent, thanks for the clarification

but remember procs from skills have a little different mechanic. I don’t even know if proc is right word. But I’m talking about the things in the night blade dual wield tree. Soldier also has two Markovian is one of those. And I think Shaman has some. Those ones are not independent. e.g. Belgothian Shears and Whirling Death (from the night blade dual wield tree) cannot fire both at the same time.