280 oranges are divided among some boys and girls whose total number is 50 so that each boy gets 5 oranges and each girl get 7 oranges. the number of girls is?

It looks like your query is incomplete or has some missing information. To solve the problem about dividing 280 oranges among boys and girls, I need the following details:

1. The total number of boys and girls combined (you mentioned "total number is 0," which seems incorrect).
2. How many oranges each boy gets.
3. How many oranges each girl gets (you mentioned 7 oranges per girl).

Could you please provide the missing details or clarify the problem? For example, if you know the total number of children or how many oranges each boy gets, I can help you find the number of girls.