I think coeducation is more beneficial than single sex education. First of all, the society is made by men and women, so coeduction can make you easily get used to work with other gender when you graduate. Second, coeducation can reduce the potential of boys having sex with boys or gilrs having sex with girls, which tends to happen more in schools conducting single sex education. Third, coedution can help students think and learn from different aspects, girls can know what boys think, and vice versa, making the school life more variety.
I don't not see any demerits of coeduction.
I don't not see any demerits of coeduction.