If bar x is the mean of x1, x2, ……. , xn and bar y is the mean of y1, y2, ….. yn and bar z is the mean of x1, x2,

If bar x is the mean of x₁, x₂, ……. , x_n and bar y is the mean of y₁, y₂, ….. y_n and bar z is the mean of x₁, x₂, …… , x_n, y₁, y₂, …. y_n, then z =?

(A) bar(x + y)/2

(B) bar(x + y)

(D) bar(x + y)/2n

If bar x is the mean of x1, x2, ……. , xn and bar y is the mean of y1, y2, ….. yn and bar z is the mean of x1, x2,

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