Question

If `barx` is the mean of x₁, x₂ ............x_n and `bary` is the mean of y₁, y₂, …….y_n and `barz` is the mean of x₁, x₂ ............x_n, y₁, y₂, ……….y_n then `barz` =?

विकल्प

• `(bar x + bar y) / 2`

• `bar x + bary`

• `(bar x + bar y)/n`

• ` (barx + bary)/(2n)`

Answer 1

`bb((bar x + bar y) / 2)`

Explanation:

Z = `(nx + ny)/ (2n)`

= `[n ( bar x + bar y )] /( 2n)`

= `(bar x + bar y)/2`