Question

Grammer question here. In the sentence "One in three truck drivers _ poor." Should it be "is" poor or "are" poor. In other words, is the subject "one" or is it "truck drivers"?

Answer 1

Believe that the subject is plural because it is talking about more than one truck driver.

Answer 2

the subject is "one" ... thus making the appropriate verb "is"
"in" is a preposition "three truck drivers" are objects or modifies of the preposition

Answer 3

'Is' would be correct since you're speaking of only one driver