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Question
Difficulty Level:

Easy

Oswal Guidebook
MCQ

Let x¯\bar{x} be the mean of x1,x2,,xnx_1, x_2, \ldots, x_n and y¯\bar{y} the mean of y1,y2,,yn.y_1, y_2, \ldots, y_n . If z¯\bar{z} is the mean of x1,x2,,xnx_1, x_2, \ldots, x_n
y1,y2,,yny_1,y_2, \ldots, y_n, then z¯\bar{z} is equal to

Select all that apply :

(x¯+y¯)2\frac{(\bar{x}+\bar{y})}{2}

x¯+y¯\bar{x}+\bar{y}

(x¯+y¯)n\frac{(\bar{x}+\bar{y})}{n}

(x¯+y¯)2n\frac{(\bar{x}+\bar{y})}{2 n}

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