Question

Calculati media aritmetica a numerelor 1 supra 2,1 supra 3 si 1 supra 4

Answer 1

$\displaystyle \frac{ \frac{1}{2} + \frac{1}{3} + \frac{1}{4} }{3} = \frac{ \frac{6}{12}+ \frac{4}{12} + \frac{3}{12} }3} = \frac{ \frac{13}{12} }{3} = \frac{13}{12} :3= \frac{13}{12} \cdot \frac{1}{3} = \frac{13}{36}$