Răspuns :
(a+b+c+d)/4=48 =>a+b+c+d=192
(a+b)/2=36 =>a+b=72
=>c+d=192-72=120
=>Media aritm.=(c+d)/2=60
(a+b)/2=36 =>a+b=72
=>c+d=192-72=120
=>Media aritm.=(c+d)/2=60
(a+b+c+d):4=48
a+b+c+d=48x4=192
(a+b):2=36
a+b=36x2=72
72+c+d=192
c+d=192-72=120
(c+d):2=120:2=60
Ma. a ultimelor doua nr. este 60
a+b+c+d=48x4=192
(a+b):2=36
a+b=36x2=72
72+c+d=192
c+d=192-72=120
(c+d):2=120:2=60
Ma. a ultimelor doua nr. este 60