Question

aflati trei numere stiind ca doua cate doua au media aritmetica :2,7;5,8si 4,4.

Answer 1

stiind ca:(a+b):2=2,7 - a+b=5,4 (a+c):2=5,8 a+c=11.6 (b+c):2=4,4 b+c=25.8 asta inseamna ca a+b+a+c+b+c=25,8 a+b+c=25,8:2=12.9 5.4+c=12.9 c=7.5 a+8.8=12.9 adica a=4,1 b=13 (asta am facut cu doamna diriginta)