Răspuns:
[tex]M_{a}=\frac{151}{70}[/tex]
Explicație pas cu pas:
[tex]M_{a}=\frac{x_{1}+x_{2}+x_{3}+...+x_{n}}{n}[/tex]
[tex]M_{a}=(\frac{3}{7}+\frac{1}{5}+\frac{2}{1}+\frac{6}{1}):4[/tex]
[tex]M_{a}=(\frac{15}{35}+\frac{7}{35}+\frac{70}{35}+\frac{210}{35}):4[/tex]
[tex]M_{a}=\frac{302}{35}:\frac{4}{1}[/tex]
[tex]M_{a}=\frac{302}{35}*\frac{1}{4}[/tex]
[tex]M_{a} = \frac{302}{140}[/tex]
[tex]M_{a}=\frac{151}{70}[/tex]
