Maths-
General
Easy

Question

The frequency distribution of daily working expenditure of families in a locality is a follows

If the mode of the distribution is RS140, Then the value of b is:

  1. 26    
  2. 31    
  3. 34    
  4. 36    

The correct answer is: 36


    Mode equals 140 comma l equals 100 f equals 37 comma f subscript 1 end subscript equals 33 comma h equals 50
    Mode equals l plus fraction numerator f minus f subscript 1 end subscript over denominator 2 f minus f subscript 1 end subscript minus f subscript 2 end subscript end fraction cross times h
    140 equals 100 plus fraction numerator 37 minus 33 over denominator 74 minus 33 minus b end fraction cross times 50 rightwards double arrow 40 equals fraction numerator 200 over denominator 41 minus b end fraction
    b equals 36

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