Câu 1 =SUM(MAX(E5:F5),MAX(G5:H5),MAX(I5:J5),MAX(K5:L5),MAX(M5:N5),MAX(O5
5),MAX(Q5:R5),MAX(S5:T5),MAX(U5:V5),MAX(W5:X5),MAX(Y5:Z5),MAX(AA5:AB5),MAX(AC5:AD5),MAX(AE5:AF5))/14
Câu 2
=IF(AG5>=9,"Xuất sắc", IF(AG5>=8, "Giỏi", IF(AG5>=7, "Khá",IF(AG5>=6,"TBK",IF(AG5>=5,"TB","Yếu")))))