Question

Media aritmetica a 5 nr este 11 pe 4. Determinati suma lor.

Answer 1

a+b+c+d+e/5=11/4
4x(a+b+c+d+e)=55
a+b+c+d+e=55/4

Answer 2

Ma = a+a1+a2+a3+a4 = $\frac{11}{4}$ 
Aflati suma: 
 11:4 = 2,75 ( media )

Aflam suma :
2,75 · 5= 13, 75