Răspuns:
Explicație pas cu pas:
[tex]a) m_{a} =\frac{0,25+0,2+2,2+0,59}{4} =\frac{3,24}{4} =0,81\\c) m_{a} =\frac{0,74+0,7+1\frac{1}{2}+2\frac{7}{10} }{4} =\frac{1,44+\frac{3}{2} +\frac{27}{10} }{4} =\frac{1,44+1,5+2,7}{4} =\frac{4,14}{4} =1,03\\[/tex]
