From a multiple choice exercise:

I bought a couple of pairs of trousers,......... of which cost more than 30 euros.

Which is the correct word to complete this sentence: neither or none?

A couple doesn't necessarily mean two, it could have been 3 pairs of trousers that I bought, so I'd say it's "none of which ...". Is it the correct choice? Thanks in advance.
It's true that "a couple of" can be synonymous to "a few of" depending on the context, but its primary sense is "two". So if there is any other context available, I'll take it as "two".

I think you would use "neither", maripinky.
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Let's see if I got this right...

NEITHER is used when there are two options and NONE for more than two? Is this right?
Students: Are you brave enough to let our tutors analyse your pronunciation?
"Neither of the two pairs of trousers I bought cost more than xxx"
"None of the three shirts I got at the same time cost more than xxx"