=SIERREUR(MOYENNE(PETITE.VALEUR(SI((C$2:C$32=K2)*ESTNUM(-SUBSTITUE(G$2:G$32;".";","));--SUBSTITUE(G$2:G$32;".";","));1);PETITE.VALEUR(SI((C$2:C$32=K2)*ESTNUM(-SUBSTITUE(G$2:G$32;".";","));--SUBSTITUE(G$2:G$32;".";","));2));SIERREUR(PETITE.VALEUR(SI((C$2:C$32=K2)*ESTNUM(-SUBSTITUE(G$2:G$32;".";","));--SUBSTITUE(G$2:G$32;".";","));1);""))