# How many billion(s) of people are there in the world now?

#### brian&me

##### Senior Member
How many billions of people are there in the world now?

(from a textbook)

I think the ‘billions’ should be ‘billion’.

What do you say?

Many thanks in advance.

• #### VicNicSor

##### Banned
No. You use "billion" after a number: "Three/ten/etc billion people". In other cases you use "billions" (if it's more than a billion).

#### Barque

##### Senior Member
No, "billions" is correct. You need "billions" to go with "How many" which implies there are multiples (plural) of a billion people in the world.

#### sound shift

##### Senior Member
"How many billion people ...?"
"How many billions of people ...?"
"How many billion of people ...?"

#### User With No Name

##### Senior Member
No, "billions" is correct. You need "billions" to go with "How many" which implies there are multiples (plural) of a billion people in the world.
I agree that it's "billions," but I'm not sure about this explanation. To me, the key is that it says "of people," so "billions" is a noun.

"How many billion people are there in the world?" would also be correct, where "how many" no longer refers to "billions" but to "people."

Cross-posted with @sound shift.

#### Barque

##### Senior Member
I agree that it's "billions," but I'm not sure about this explanation.
If you're objecting to my statement that "billions" is needed to go with "How many", I obviously meant "in the given sentence". Yes, I agree that you can have "How many billion" as in the alternative you suggested (which sounds comparatively informal to me), but that's a different sentence. You were able to pair "billion" with "How many" because you changed the sentence.

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