Mathematics Statistics Measures of Central Tendency

If the mean of observations x, x + 3, x + 5, x + 7 and x + 10 is 11, then the mean of last three observations is:

1
\(12{2\over3}\)
2
\(12{1\over3}\)
3
\(14{2\over3}\)
4
\(13{1\over3}\)
5
None of the above

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