Model 8 population based Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

Of the 1000 inhabitants in a town 60% are males of whom 20% are literate. If of all the inhabitants, 25% are literate, then what percentage of the females of the town are ilterate ?

a) 32.5

b) 27.5

c) 37.5

d) 22.5

Question : 2

The value of a property depreciates every year by 10% of its value at the beginning of the year. The present value of the property is Rs.8100. What was its value 2 years ago ?

a) Rs.$(90/100)^2 × 8100$

b) Rs.10,000

c) Rs. $(100/110)^2 × 8100$

d) Rs.9801

Question : 3

The population of a village has increased annually at the rate of 25%. If at the end of 3 years it is 10,000, the population in the beginning of the first year was

a) 5000

b) 5120

c) 4900

d) 4500

Question : 4

The value of a machine depreciates every year by 10%. If its present value is Rs.50,000 then the value of the machine after 2 years is _________.

a) Rs.45,000

b) Rs.40,050

c) Rs.40,005

d) Rs.40,500

Question : 5

The population of a village increases by 5% annually. If its present population is 4410, then its population 2 years ago was

a) 4000

b) 4500

c) 3800

d) 3500

Question : 6

In a factory, the production of cycles rose to 48, 400 from 40,000 in 2 years. The rate of growth per annum is

a) 8%

b) 9%

c) 10.5%

d) 10%