[tex] \frac{5}{6} + \frac{2}{3} = \frac{5}{6} + \frac{4}{6} = \frac{9}{6} = \frac{3}{2} \\ media \: aritmetica = \frac{ \frac{3}{2} }{2} = \frac{3}{2} \times \frac{1}{2} = \frac{3}{4} [/tex]
[tex]0.5= \frac{5}{10} = \frac{1}{2} \\ \frac{ \frac{1}{2} + \frac{1}{4} }{2} = \frac{ \frac{3}{4} }{2} = \frac{3}{4} \times \frac{1}{2} = \frac{3}{8} [/tex]
[tex]0.75 = \frac{75}{100} = \frac{3}{4} \\ \frac{ \frac{3}{4} + \frac{7}{5} }{2} = \frac{ \frac{22}{20} }{2} = \frac{22}{20} \times \frac{1}{2} = \frac{11}{20} [/tex]
[tex] \frac{4 + 3.8 + 4.5 + 4.2 + 4.1}{5} = 4.12 \: este \: dobanda \: medie[/tex]
