Question

Calculati media aritmetica ponderata a numerelor 139 si 126 cu poderile 2 respectiv 3

Answer 1

media ponderată = (139*2 +126*3)/2+3 => (278 + 378)/5 => 656/5 => 131.2

Answer 2

$m_p=\frac{139\cdot2+126\cdot3}{2+3}=\frac{278+378}{5}=656:5=131,2$