Isn't the following sentence grammatically correct?
The group of fifty people are going to arrive Thursday.
What's wrong with it? Someone said it should be
The group of fifty people is going to arrive Thursday.
Why? People is plural so why is people is better than people are?
Best Answer
Strictly speaking, the subject of the verb here is the singular noun group; of fifty people is just a prepositional phrase modifying the noun. It is parsed as if it were written thus:
It's not that simple, however. For one thing, group is a collective noun, which may be construed as either a singular or a plural, depending on your emphasis.
So which verb you use really depends on what you mean; and that's something that can’t be judged from this little fragment of discourse. Including the phrase of fifty people might mean you are trying to emphasize the count:
On the other hand, the phrase may be parenthetical, just thrown in for additional information:
Or the phrase may be restrictive:
Say what you mean, and in this case at least you’ll be OK. As the great linguist H.Dumpty said, “Take care of the sense and the sounds will take care of themselves.”
[NOTE: Speakers of British English are more likely to use the plural than speakers of American English. But both populations will understand you perfectly well, and hardly anybody will even notice which verb you use. Or care.]