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I have learned this sentence during a Japanese lesson

> 会議室に人が何人いますか。

I don't understand why there is double information about 人? Why is it not just
this form? and are there differences between these two forms?

> 会議室に何人いますか。

And is it ok to also say :

> 会議室に何人ですか。
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2022-02-21T11:55:57.947
93486
2022-08-22T23:23:57.503
39148
question
grammar
人が何人います grammar construction
There is no **double** information. 何人 is used for a counter - consider it a
unit of measurement. You are responsible to attach the correct counter, but
the **counter is not responsible to explain the subject**.

A. How many **kg** does that **weigh**? (subject + unit of measurement)

B. How many **kg** is it? (without subject)

Some may think A is too much (double) information. Some may think B is too
less (few) information. Both are correct, neither is wrong.

* * *

  * 会議室に人が何人いますか。
  * 会議室に何人いますか。

They both make sense. Longer sentence is verbose and formal. Shorter sentence
is lean and casual. Both are correct, neither is wrong.

* * *

> And is it ok to also say : 会議室に何人ですか。

No :( This one is a grammatical error. It should be:

"会議室に何人いますか" or "会議室にいるのは何人ですか".

* * *

The above is the answer considering your question:

> "is it ok to also **say** "

It would be different if we **write**. Because the kanji 何人 can mean:

  * how **many** people

or

  * what **nationality**

Considering that:

**会議室に [何人]{なにじん} がいますか** In the meeting room, person of which nationality is
there?

**会議室に [何人]{なんにん} いますか** In the meeting room, how many number of people is
there?
CC BY-SA 4.0
2022-02-21T13:32:48.537
93488
2022-08-22T23:23:57.503
2022-08-22T23:23:57.503
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answer