Question

Find the mean of x + 3, x + 5, x + 7, x + 9 and x + 11.

Answer 1

The given values are  x + 3, x + 5, x + 7, x + 9, x + 11

We know the mean is given by,

Mean = `"Sum of the elements​"/"Total number of elements"`

Here, the number of observations = 5.

`"Mean" = ( x + 3 + x + 5 + x + 7 + x + 9 + x + 11 )/(5)`

= `(5x + 35)/(5)`

= `(5 (x + 7))/5`

= x + 7.