Question

The following table shows the population of six different cities, A, B, C, D, E and F, the ratio of males to females among them and the ratio of adults to children in the total population. Study the table and answer the question.

City	Population	Male : Female	Adult : Children
A	410400	13:11	5:3
B	369900	5:4	7:2
C	442800	5:7	7:5
D	465500	17:18	4:3
E	499500	5:4	5:4
F	424500	8:7	17:13

What is the difference between the total number of adults and the total number of children in city A?

• A. 1,04,600
• B. 1,02,600
• C. 1,02,000
• D. 1,12,600

Answer 1

Answer:

B. 1,02,600

The difference between the total number of adults and the total number of children in city A is 102,600.

* Identify data for City A:

* Total Population = 410,400

* Ratio of Adults to Children = 5 : 3

* Find the ratio parts:

* Total parts = $5 + 3 = 8$

* Difference in parts = $5 - 3 = 2$

* Calculate the difference:

* Difference = $\frac{2}{8} \times 410,400$

* Difference = $\frac{1}{4} \times 410,400$

* Difference = 102,600