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Clavis TMUA Set B Paper 1 · Q17

Paper 1StatisticsSequences & series

The ten numbers x1,x2,…,x10x_1,x_2,\ldots,x_{10} have mean 1212, and the mean of their squares is 200200.

Find the value of

∑i=110(xi−12)2.\sum_{i=1}^{10}(x_i-12)^2.
A320320
B440440
C560560
D680680
E800800

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