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Variance of {2, 4, 6, 8, 10}:

A2
B4
C8
D10
Answer & Solution
Correct answer: C. 8
Mean = 6. Deviations: -4, -2, 0, 2, 4. Squared: 16, 4, 0, 4, 16. Sum = 40. Variance = 40/5 = 8.
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