How do you say i have got 3 brothers and sisters in french?

There are a few ways to say "I have got 3 brothers and sisters" in French, depending on how you want to emphasize the number of siblings:

Formal:

* J'ai trois frères et sœurs. (This is the most literal translation and is perfectly correct.)

Informal:

* J'ai trois frères et sœurs. (This is also correct and more commonly used in everyday speech.)

* J'ai trois frères et sœurs, en tout. (This emphasizes the total number of siblings.)

* J'ai trois frères et sœurs, dans ma famille. (This emphasizes that they are your siblings within your family.)

You can also use variations like:

* J'ai trois frères et une sœur. (If you have 3 brothers and one sister)

* J'ai une sœur et trois frères. (If you have one sister and three brothers)

Remember, the best way to say it depends on the context of the conversation.