word choice - a large number of/ large numbers of, What's the difference?



Tests are hard to solve for large number of users.



Checking the similar usage of such expression, I think there is something wrong with the sentence. What's the best and correct? a large number OR large numbers OR even something else!



Answer



These are both correct:



Tests are hard to solve for a large number of users.


Tests are hard to solve for large numbers of users.



The second sentence has a slightly more general connotation, like "users in general", whereas the first probably implies users of a specific application.


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