Question

Află media aritmetică a numerelor 3 supra 7;1supra5;2;6​

Answer 1

3 / 7 ; 1 / 5 ; 2 ; 6

mₐ  = ( 3 / 7 + 1 / 5 + 2 + 6 ) / 4 =

     = [ ( 15 + 7 + 70 + 210 ) / 35 ] / 4 =

     = [ ( 302 / 35 ) ] / 4 =  302 / 35 · 1 / 4 = 302/ 140 = 151 / 70

mₐ = 151 / 70

Answer 2

Răspuns:

    $M_{a}=\frac{151}{70}$

Explicație pas cu pas:

    $M_{a}=\frac{x_{1}+x_{2}+x_{3}+...+x_{n}}{n}$

    $M_{a}=(\frac{3}{7}+\frac{1}{5}+\frac{2}{1}+\frac{6}{1}):4$

    $M_{a}=(\frac{15}{35}+\frac{7}{35}+\frac{70}{35}+\frac{210}{35}):4$

    $M_{a}=\frac{302}{35}:\frac{4}{1}$

    $M_{a}=\frac{302}{35}*\frac{1}{4}$

    $M_{a} = \frac{302}{140}$

    $M_{a}=\frac{151}{70}$