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MHT CET 2023 Mathematics question

MathematicsStatisticsMHT CET 2023

Mean and variance of six observations are 8 and 16 respectively. If each observation is multiplied by 3, then new variance of the resulting observations is

Answer: (D)

Solution

If every observation is multiplied by a constant , the new mean is and the new variance is (variance depends on the square of the scale; the number of observations does not matter). With : new mean and new

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Question ID VK-095252