The mean of five observations x, x + 2, x + 4, x + 6, x + 8

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M: +1.00/-0.33

The mean of five observations x, x + 2, x + 4, x + 6, x + 8 is m. What is the mean of the first three observations?

[CDS II 2020 Mathematics Past paper]

m – 1

m – 2

m – 3