Study the given table and answer the question that follows.
The table shows the population of three cities P, Q and R, as percentages of the total population of these three cities taken together. It also shows the percentage of the population above 60 years of age in each of these cities, and also the ratio of males to females below 60 years of age, in each of these cities. The total population of all the three cities taken together is 3,00,000.
|
City |
Population |
Above 60 |
M : F (Below 60 years) |
|
P |
45% |
30% |
3 : 7 |
|
Q |
30% |
70% |
3 : 1 |
|
R |
25% |
40% |
12 : 13 |
Find the male population of city R that is below 60 years.
Answer & explanation
Correct answer: option 3
40% of population of R is above 60 . so 60% of population of R is below 60.
Male population of city R that is below 60 years = \(\frac{12}{25}\) × \(\frac{25 }{100}\) × \(\frac{60 }{100}\) × 300000
= \(\frac{12}{25}\) × \(\frac{1 }{4}\) × \(\frac{3 }{5}\) × 300000
= 21600