Question

Calculati media aritmetica: 4supra7 -2supra5 repede va rog

Answer 1

4 supra 7 = 0,58
2 supra 5 =0,4
0,58 - 0,4 = 0,54

Answer 2

$m_a= \frac{ \frac{4}{7} +(- \frac{2}{5} )}{2} = \frac{ \frac{20}{35} +(- \frac{14}{35} )}{2} = \frac{ \frac{6}{35} }{2} = \frac{6}{35} :2= \frac{6}{35} * \frac{1}{2}= \frac{6}{70} = \frac{3}{35}$