Question

Aflati media aritmetica a urmatoarelor grupe de numere:
/- supra.
3.5 0.4 1.(3) 2intregi 1/5
0.(7) 3intregi 1/3 0.25 1 ,1(6)

Answer 1

3,5=35/10=7/2
0,4=4/10=2/5
1,(3)=(13-1)/9=12/9=4/3
2 1/5=11/5
(7/2+2/5+4/3+11/5)/4=
=[(105+78+40)/30]/4=
=223/120=1,858(3)


0,(7)=7/9
3 1/3 =10/3
0,25=1/4
1,1(6)=(116-11)/90=105/90=7/6
(7/9+10/3+1/4+7/6)/4=
=[(28+120+9+42)/36]/4=
=199/144=1,3819(4)