How it can happen?

I am quite happy to hear that my little brother got the 1st class for his academic year in grade 7.  Howerver, when i asked him he said there are 7 students who get the 1st class. It should not happen like that. For my opinion, it should has at most 3 students who can get the 1st class. One more bad thing is almost all the courses, teachers allow students to cheat during exam that make education quality go down. And it is true, my brother got 1st class but when I test him; he should not get the first class.

I don’t want to say bad thing about my brother. However, I am really upset to know about this thing .