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I'm wondering, is this correct?

"I like those ones."
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Comments  (Page 2) 
Right on to you!! It does sound semi-literate.
So, this sounds okay?

Customer: Could I see those pants over there?

Store clerk: Which?

In this case, shouldn't 'ones' be included?
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ones is optional after which.

-- Could I see those pants over there?
-- Which (ones)?
--
[pointing] Those.*

CJ

*In AmE, not "Those ones"!