Why co education necessary?

Answer 1

Co-education is not strictly necessary, there are still organisations that separate boys and girls for religious or cultural reasons.

But to the extent that education is a preparation for adult life, it makes sense to have boys and girls educated together:- they will work together when they are adults.

The arguments for allowing boys and girls to be educated together are very similar to the arguments that Muslims and even mildly handicapped people should be educated in standard schools: it prepares such children to integrate in their later life.