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NDA Mathematics 16 April 2023
MCQ (Single Correct Answer)
+2.5
-0.83
Let P be the median, Q be the mean and R be the mode of observations x1, x2, x3, .....xn. Let $S=\sum\limits_{i=1}^n\left(2 x_i-a\right)^2$ S takes minimum value, when a is equal to
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