Maharashtra State BoardHSC Commerce 12th Board Exam
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The Following Table Gives the Ages of Husbands and Wives - Mathematics and Statistics

The following table gives the ages of husbands and wives 

Age of wives
(in years)
           Age of husbands (in years) 
20 - 30 30 - 40 40 - 50 50 - 60 
15 - 25 5 9 3 -
25-35 - 10 25 2
35-45 - 1 12 2
45-55 - - 4 16
55-65 - - - 4

Find : (i) The marginal frequency distribution of the age of husbands.
(ii) The conditional frequency distribution of the age of husbands when the age of wives lies between
25 - 35.

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Solution

Age of wives
(in years)
           Age of husbands (in years) 
20 - 30 30 - 40 40 - 50 50 - 60 
15 - 25 5 9 3 -
25-35 - 10 25 2
35-45 - 1 12 2
45-55 - - 4 16
55-65 - - - 4
Total 5 20 44 24

Now, marginal distribution of age of husbands. 

Age (years) 20-30 30-40 40-50 50-60 Total
Number 5 20 44 24 93

Now marginal distribution of husband, when the
age of wives lies between 25 – 35 

Age (years) 20-30 30-40 40-50 50-60 Total
Number - 10 25 2 37
  Is there an error in this question or solution?
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