Level 3- Line Chart Practice Quiz -4 Hard

Directions: Study the following information carefully and answer the questions given beside:
The following line chart shows the birth rate (per thousand persons) and death rate (per thousand persons) of countries A, B, C, and D in the year 2014.

Population Increase = [Population increase rate × Population] /1000

1. If the population of country B is 20 million at the beginning of year 2014, by how much would its population increase in this year?
A 17 thousand
B 34 thousand
C 20 thousand
D 19 thousand
E None of these

Correct Option: B
If Birth Rate and Death Rate are given, then population increase per thousand persons will be given by (Birth Rate – Death Rate).

⇒ Population increase rate of country B = (8.3 – 6.6) per thousand of population = 1.7 per thousand of population

∴ Population increase of country B = [Population increase rate × Population] /1000
= 1.7 × 20 × 1000000/1000 = 34 thousand.
Hence, option B is correct.

2. By what percentage is the birth rate of country B is more than that of country C?
A 7.5%
B 93.02%
C 23.27%
D 63.33%
E Can’t be determined

Correct Option: B
Birth rate of country B = 8.3

Birth rate of country C = 4.3

∴ Percentage by which birth rate of country B is more than that of country C

= 8.3 – 4.3 × 100/4.3 = 93.02.
Hence, option B is correct.

 

The population increase in countries A and C during year 2014 was same. What was the ratio of populations of countries A and C at the beginning of year 2014?
A 11 : 17
B 17 : 13
C 19 : 23
D 4 : 11
E 4 : 19

Correct Option: C
We know that, Population increase of a country

= [Population increase rate × Population] /1000
Where, Population increase rate = Birth rate – Death rate

Population increase rate for country A = 7.6 – 5.3 = 2.3 per thousand of population

Population increase rate for country C = 4.3 – 2.4 = 1.9 per thousand of population

⇒ Population increase of country A
= [2.3 × Population of country A] /1000
Population increase of country C
= [1.9 × Population of country C] /1000
Since the population increase in both countries A and C is equal.
∴ [2.3 × Population of country A] /1000= [1.9 × Population of country C]/1000
⇒ [2.3 × Population of country A] = [1.9 × Population of country C]
⇒ Population of country A / Population of country C = 1.9/2.3 = 19/23

∴ Ratio of populations of countries A and C at the beginning of year 2014 was 19 : 23.

Hence, option C is correct.

4. What will be the ratio of number of deaths in country A to number of births in country C?
A 19 : 11
B 5 : 9
C 11 : 17
D None of these
E Can’t be determined

Correct Option: E
We know that A number of deaths in a country = [Death rate × Population]/ 1000

Here, we are given only the death rates of countries A and C but not population. Without knowing the population, the actual number of deaths in countries A and C cannot be found, and hence the ratio of deaths cannot be determined.

Hence, option E is correct.

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