Question

10.Aflati trei numere rationale ce sunt invers proportionale cu 0.(3) si 0,25 ; 0.2 si au media aritmetica egala cu 60
RAPIID VAAA ROOOG :

Answer 1

a/3=b/4=c/5=k
a/3=k⇒a=3k
b/4=k⇒b=4k
c/5=k⇒c=5k
a+b+c=3k+4k+5k=12k
ma=(a+b+c)/3
60=12k/3
60=4k
k=60/4
k=15
a=45
b=60
c=75