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TMUAmockz Set 1 Paper 2 · Q4

Paper 2StatisticsSequences & series

A data set consists of seven values:

4,1,15,x,1,10,14,\quad1,\quad15,\quad x,\quad1,\quad10,\quad1

where xx is a real number. The mean, median and mode of this data set form a non-constant arithmetic progression. Find the sum of all possible values of xx.

A33
B1414
C1717
D1818
E2020
F2121

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