Question

In an interview for a boy 400 candidates appeared out of which 200werevpost graduate 180have prior experience and 160can speak english 100of them were post graduate with prior experience 70have prior experience and can speak english 80are post graduate and Can speak english 80are post graduate and can speak english and 60are post graduate with prior experience and can speak english how many candidates had none of the three

Answer 1

This question is quite confusing