bigoyal wrote:

vaivish1723 wrote:

Please explain why 'numbers' is right.

Amount relates to quantities of things that cannot be counted, but can be measured.

Number to things that can be counted.

Example,

amount of space, amount of milk.

You cannot say

Number of Milk, but surely you can say

Number of glasses of MilkSimilarly, people are considered to be countable item. So we have to use

Number of people.

Amount of People would be wrong.

Similarly,

little, much, less are used with amount items. And

many, few are used with Number items.

Example,

there was little crowd, and

there were few peopleWhat has been asked here the reason for the word

numbers and not number.

This is what I think, but could be wrong.

We know that we use number in general:

(A number of - plural) A number of people have now started showing interest ...

(the number - singular) the number of doctors in the hospital is ...

here we are talking of the numbers (plural of number ==> set having multiple values)

All the numbers given in the question are real numbers.

A large number of people ==> signify that we know that quantity is discrete.

==>

above can represent 1 million people a single unit, but there is one figure replacing that large number.Here we are talking differently.

Large numbers of people.

multiple units of people(each unit is a large number) (may be in different locations)

e.g. Voters turn out in large numbers (across the states/voting booths)

==> multiple "large number"(s for plural) at different location

numbers a set (1million (location1), 2m (location2), and so on)

Opinions!

_________________

Consider kudos for the good post ...

My debrief : http://gmatclub.com/forum/journey-670-to-720-q50-v36-long-85083.html