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KCET2019MathematicsStatistics

Mean and standard deviation of ( 100 ) items are ( 50 ) and ( 4 ) respectively. The sum of all squares of the items is

Options

  1. A( 256100 )
  2. B( 261600 )
  3. C( 251600 )
  4. D( 266000 )

Correct answer

C. ( 251600 )

Step-by-step solution

(C) [ array l = x i² n - ( x ² ) 4= x i² 100 -(50)² 16= x i² 100 -2500 x i²=251600 array ]

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