Question

Media aritmetica a numerelor rationale 6.1;4.6si x este egala cu 5.3.Aflati numarul x

Answer 1

Ma=(6.1+4.6+x)÷3
Ma=5.3
Suma nr.=5.3×3
Suma nr.=15.9
6.1+4.6+x=15.9
10.7+x=15.9
x=15.9-10.7
x=5.2