1.
how many people
interrogative asking about the number of people
何人 is the interrogative form of the 人 counter, used to ask about the number of people.
Pronunciation
Read as なんにん (how many people), not なにじん. 何人 is a completely different word meaning "what nationality" (e.g., 何人ですか = What nationality are you?).
Common patterns
- 何人ですか: How many people? (e.g., at restaurants)
- 何人で: with how many people
- 何人いる: how many people are there
- 何人分: for how many people (portions)
- 何人来る: how many people are coming