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Observe the following table:

Year201020112012201320142015
Annual Sale405060708090

If the three-year moving averages of the above observations are A, B, C, D respectively, then the largest value of the three-year moving averages is :

Solution

✅ Correct Option: 4

The three-year moving averages are 40+50+603=50\frac{40+50+60}{3} = 50, then 6060, 7070 and 8080. Since sales rise steadily, the last average D=80D = 80 is the largest.

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