Question

calculati media aritmetica a numerelor a si b ,stiind ca a=1pe 3 + 12 pe 5 si b=2 pe 3+3 pe 5

Answer 1

media aritmetica= a+b/2⇒media aritmetica=$\frac{1/3+12/5+2/3+3/5}{2}$⇒media aritmetica=$\frac{3/3+15/3}{2}$⇒media aritmetica=1+5/2⇒media aritmetica=3

Answer 2

[tex]a= \frac{{^5^}^)1}{3} + \frac{^3^)12}{5} \\\\ a= \frac{5+36}{15}\\ \\\boxed{a= \frac{41}{15} }\\\\\\ b= \frac{^5^)2}{3} + \frac{^3^)3}{5} \\\\ b= \frac{10+9}{15} \\\\ \boxed{b= \frac{19}{15} }\\\\ M_a= \frac{a+b}{2} \\\\ =>M_a= \frac{ \frac{41}{15} + \frac{19}{15} }{2} \\\\ M_a= \frac{60}{2} \\\\ \boxed{\boxed{M_a=30 ~cm}}[/tex]