Question

daca media aritmetica a doua numere este 15 atunci suma lor este..?

Answer 1

$m_{aritmetic\breve{a}}=\dfrac{a+b}2,\;deci\;a+b=2m_{aritmetic\breve{a}}=2\cdot 15=30.$

Green eyes.

Answer 2

(a+b):2=15
a+b=15×2=30