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AP EAMCET20227 Jul 2022Evening ShiftMathematicsStatisticsActual

The standard deviation of first 10 multiples of 4 is

Options

  1. A7
  2. B8
  3. C11.5
  4. D14

Correct answer

C. 11.5

Step-by-step solution

Entries are 4,8,12,16,20,24,28,32,36,40 . aligned Variance & = _ i=1 ¹⁰(4 i)^2 10 - ( _ i=1 ¹⁰ 4 i 10 )^2 & = 16 10 11 21 60 - ( 4 55 10 )^2 & =132 aligned Standard deviation = 132 11.5

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