The phrase 'which ones of' is correct and usable in written English.
You can use it when you want to ask which specific ones out of a group of items. For example: "Which ones of these books have you read?".
Which ones of those are you enjoying these days?
But we do try and assess which ones of those have problems or don't have problems.
"Even if you know that 90percentt of them are true planets, you'd like to know which ones of them they are," says Morton.
We have a new mission that was just approved by NASA and that we're building, and that's called TESS, that in 2017, so in two years from now, will actually go up and scan all the closest, brightest stars in the sky to tell us which ones of those host planets that could be like ours.
Bulk density tests were applied for several other biomass fuels too, and later used to determinate which ones of all the biomass-fuels tested are economically more profitable for a typical transport/store system made of a screw conveyor and a concrete bunker silo.
The trick is actually figuring out which ones of those are free," he tells TechCrunch.
So, come on, 'fess up, which one of you is looking for a handsome older man?
Which one of us agrees on everything with any other single person?
A listener came on and said: "Now which one of you is the seventh Python?" And I said, "Yes, Neil, which one of us is?
But which one of the two came out on top?
Presently, he demanded to know which one of us could do a memo on it.
