Respuesta :

veronicaculs

Answer:

a+b=0.7

Step-by-step explanation:

  • The average of a  "n" finite serie of numbers can be calculated as [tex]average= \frac{1}{n}\times(x_1+x_2+....+x_n)[/tex], being [tex](x_1,x_2,...x_n)[/tex] the finite serie of numbers.
  • Then, applying this equation to your data, where you have [tex](x_1,x_2,....,x_n)=(4,a,b,6).[/tex], means that [tex]7=\frac{1}{4} \times{(4+a+b+6)[/tex].
  • This yields in a+b=0.7

Answer:

The sum of numbers a and b,

i.e., a + b is 18

Explanation:

Given the average (arithmetic mean) of 4, a, b, 6 is 7

Then, according to question,

[tex]\frac{(4+a+b+6)}{4} = 7[/tex]

4 + a + b + 6 = [tex]7\times4[/tex]

10 + a + b = 28

a + b = 28 -10

a + b = 18

Therefore, the sum of numbers a and b, i.e., a + b is 18

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