Răspuns:
Explicație pas cu pas:
ma (10,5 ; 47,34) = (10,5+47,34)/2 = 57,84/2 = 28,92
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ma (10,12 ; 30,2) = (10,12+30,2)/2 = 40,32/2 = 20,16
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ma (3,45 ; 1,03 ; 0,65) = (3,45+1,03+0,65)/3 = 5,13/3 = 1,71
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ma (15,3 ; 112,7 ; 101,6) = (15,3+112,7+101,6)/3 = 229,6/3 = 76,5(3)