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Afla trei numere,stiind ca doua cate doua au media aritmetica egala respectiv cu:39,50,24.

Răspuns :

(a+b):2=39
a+b=78

(a+c):2=50
a+c=100

(b+c):2=24
b+c=48

2a+2b+2c=78+100+48
2(a+b+c)=226
a+b+c=113

⇒a=113-48
a=65

⇒b=113-100
b=13

⇒c=113-78
c=35