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Which is correct: “one or more is” or “one or more are”?
“1 in 10 are” or “1 in 10 is”?

Which is grammatical and why?

About one in 12 Australian babies is not fully immunised.


About one in 12 Australian babies are not fully immunised.

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marked as duplicate by jwpat7, StoneyB, tchrist, RegDwigнt Dec 2 '12 at 18:28

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

possible duplicate of Which is correct: "one or more is" or "one or more are"? and also see linked questions question #35389, question #40669, question #8545, question #64575 – jwpat7 Dec 2 '12 at 16:20
@jwpat7 I think question #64575 is the best match for dupe. – tchrist Dec 2 '12 at 18:19
@tchrist, yes, that appears to be a better lexical match – jwpat7 Dec 2 '12 at 18:25
I think most people would be more comfortable with using “one baby in twelve is” but “one in twelve babies are”. – tchrist Dec 2 '12 at 18:31

It depends on which word you believe to be the subject of the sentence. Technically, the subject of this sentence is one, and that would take a singular copula. Nevertheless, one could argue that babies is the real subject, and that the noun is modified by the adjectival phrase "one in 12 Australian" — and that is probably what most people's ears would hear.

My advice would be to use the singular in any academic or formal writing and not to worry about it otherwise.

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Surely the subject is '(About) one in twelve babies' and ignoring the hedging premodifier about, one could argue that 'one in twelve' corresponds to a fraction. In UK English, one would use notional agreement: 1/12 (8%) of Australian babies are ... . However, it would have to be 'Two out of every seven babies are' but 'One out of every seven babies is...' . – Edwin Ashworth Dec 2 '12 at 17:09

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