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media aritmetic(m/a) a 4 nr este 75.DETERMINATI SUMA LOR VA ROOOGG! MUUUUUUULT

Răspuns :

[tex] \frac{a+b+c+d}{4} [/tex]=75
a+b+c+d=75x4
a+b+c+d=300
(A+b+c+d):4=75. a+b+c+d=4*75. a+b+c+d=300