Question

Media aritmetica a numerelor a si b este 26, media aritmetica a numerelor a si c este 12 iar media aritmetica a numerelor b si c este 22. aflati numerele a,b si c.

Answer 1

(a+b):2=26
a+b=26×2
a+b=52

(a+c):2=12
a+c=12×2
a+c=24

(b+c):2=22
b+c=22×2
b+c=44

a+b+a+c+b+c=52+24+44
2×a+2×b+2×c= 120
2×(a+b+c)=120
a+b+c=120:2
=>
a+b+c=60
a= (a+b+c)-(b+c)
a= 60-22
***a=36***
b= (a+b+c)-(a+c)
b= 60-44
***b= 16***
c= (a+b+c)-(a+b)
c= 60-52
***c=8***