Question

Media aritmetica a sase nr este 70.Calculați media aritmetica a trei dintre acestea stiind ca media aritmetica a celorlalte trei este 60. Va rog repede!!!da coroana

Answer 1

$\dfrac{a + b + c + d + e + f}{6} = 70 a + b + c + d + e + f = 70 * 6 = \ \textgreater \ a + b + c + d + e + f = \underline{420} a + b + c = 60 * 3 = \ \textgreater \ a + b + c = \underline{180} = \ \textgreater \ d + e + f = 420 - 180 = \ \textgreater \ d + e + f = \underline{240} = \ \textgreater \ \dfrac{d + e + f}{3} = \dfrac{240}{3} = \ \textgreater \ \dfrac{d + e + f}{3} = \boxed{\boxed{\boxed{80}}}$