• # question_answer 16) Number of persons in various age groups in a town is given in the following table Age group Number of persons 1-14 2 lakh 15-29 1 lakh 60 thousands 30-40 1 lakh 20 thousands 45-59 1 lakh 20 thousands 60-74 80 thousands 75 and above 40 thousands Draw a bar graph to represent the above information and answer the following questions, (take 1 unit length = 20 thousands) (a) Which two age groups have same population? (b) All persons in the age group of 60 and above are called senior citizens. How many senior citizens are there in the town?

 1-14 $\frac{200000}{20000}=10\text{units}$ 15-29 $\frac{160000}{20000}=8\text{units}$ 30-44 $\frac{120000}{20000}=6\text{units}$ 45-59 $\frac{120000}{20000}=6\text{units}$ 60-74 $\frac{80000}{20000}=4\text{units}$ 75 and above $\frac{40000}{20000}=2\text{units}$
(iii) Draw bar of equal width and of height calculated in Step (ii) on the horizontal line with equal gap between them. Thus, we get the following bar graph (a) From bar graph, we see that the lengths of bars for age group 30-44 and 45-59 are same, so age group (30-44) and (45-559) have the same population. (b) $\because$ persons having age 60 or above are called senior citizens. $\therefore$ Number of senior citizens in the town = Number of persons of age group (60-74) + Number of persons of age 75 and above = 80000 + 40000 = 120000