Question

Media aritmetica a trei numere 25,48. Aflati numerele daca media aritmetica a primelor doua este 22,32 si al doilea este cu 3,66 mai mic decat al treilea

Answer 1

a,b,c-nr.
(a+b+c):3=25,48
(a+b):2=22,32
a+b=22,32×2
a+b=44,64
a=44,64-b
a=44,64-(c+3,66)
a=44,64-c-3,66
a=40,98-c
b=c+3,66
(a+b+c):3=25,48
(40,98-c+c+3,66+c):3=25,48
44,64+c=25,48×3
44,64+c=76,44
c=76,44-44,64
c=31,8
a=40,98-c
a=40,98-31,8
a=9,18
b=c+3,66
b=31,8+3,66
b=35,46