Originally Posted by HarryT
Yes, I see your point; you're considering the collective whole of the "1 in 6" rather than the 1 individually. I think it's a case where either a singular or plural could be considered correct, although personally I prefer the singular in this case.
I meant to say, earlier, that I personally preferred, ear-wise, the "1-is," over the "boys-are," given the sentence in its entirety, but I do think, in this instance, that what you say is true--given the way the sentence is written, it could be interpreted either way--the collective plural or the 1. Hmmm...we certainly get some interesting "stuff" here on MR, don't we?