Question

Calculati media aritmetica ponderata a numerelor rationale pozitive: 7/20 si 11/45 cu ponderile 2, respectiv 3

Answer 1

M ponderata = ( 7/20 x 2 + 11/45 x3) / 2+3
M ponderata = ( 7/10 + 11/15 ) / 5
Mponderata = ( 21/30 + 22/30) /5
M ponderata= 43/30 :5
Mponderata = 43/30 x 1/5
M ponderata = 43/150