A.SUM(C$19:D$19)
B.SUM(C$2:D$4)
C.SUM(B$19:C$19)
D.SUM(B$2:C$4)
A.=SUMIFS(D2:D301,A2:A301,"第一中学",B2:B301,"3班")/COUNTIFS(A2:A301,"第一中学",B2:B301,"3班")
B.=SUMIFS(D2:D301,B2:B301,"3班")/COUNTIFS(B2:B301,"3班")
C.=AVERAGEIFS(D2:D301,A2:A301,"第一中学",B2:B301,"3班")
D.=AVERAGEIF(D2:D301,A2:A301,"第一中学",B2:B301,"3班")
A.=MID(D2,1,8)+ "****"+MID(D2,13,6)
B.=CONCATENATE(MID(D2,1,8),"****",MID(D2,13,6))
C.=REPLACE(D2,9,4,"****")
D.=MID(D2,9,4,"****")