Question

[nguyen huy quang]

Khoi lop 6 o mot truong hoc co 4 lop a,b,c,d.Hs lop 6a=1/5 hs khoi 6 va bang 8/9 hs lop 6b.hs lop 6c= 11/9 so hs lop 6b va it hon hs lop 6d la 5 hs.Tinh so hs khoi 6.

Answer 1

[trương minh anh]

hello