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0,(3);0,1(6) si 0,(4) cu ponderile 3,15 si 9 

calculati media ponderata a numerelor:


Răspuns :

3/9*3+15/90*15+4/9*9/3+15+9=
Mp=1+15/6+4/27
Mp=6+15+24/6/27=
Mp=45/6/27
Mp=45/6*1/27
Mp=45/162