Maths-
General
Easy

Question

An incomplete frequency distribution is given below Median value is 46, the missing frequency is

  1. 33.5    
  2. 35    
  3. 34    
  4. 26    

The correct answer is: 34


    Median equals 46 which lies in 40—50 class
    l equals 40 comma h equals 10 comma N equals 229
    f equals 65 comma c. f equals x plus 42
    Median equals l plus fraction numerator h over denominator f end fraction left parenthesis fraction numerator N over denominator 2 end fraction minus c. f right parenthesis
    46 equals 40 plus fraction numerator 10 over denominator 65 end fraction left square bracket fraction numerator 229 over denominator 2 end fraction minus left parenthesis x plus 42 right parenthesis right square bracket
    x equals 33.5
    Where x equalsfrequency of class 30—40
    x equals 34

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