What's the correct plural of person? Persons or people?
Both are correct, and people has overtaken persons for general situations.
Most often in causal conversation, you will hear people used. Persons is used in more formal constructs.
Both are correct and both are required in English language, you just have to know how to use them.
People denotes a group, an unspecified number of people, for example:
Persons refers to persons individually and denotes an exact number which can be, or should be able to, expressed in numbers, for example:
Remember that persons is usually used in law and legal documents, like: