Table: Sales of 3 items over 3 months Item | Jan | Feb | Mar X | 150 | 180 | 170 Y | 120 | 110 | 130 Z | 200 | 210 | 190 Which item had the highest average sales?

X
Y
Z
X and Z equal

Correct answer: Z

Solution

For X, average = \((150+180+170)/3=500/3\). For Y, average = \((120+110+130)/3=360/3=120\). For Z, average = \((200+210+190)/3=600/3=200\), which is the highest.

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