IBPS SO Prelims Exam Model Paper 9

Combining statements I and II:
Population of city Q was 25% less than the population of city P in 2017.
Suppose the population of city P in 2017 is x
⇒ Population of city Q in 2017 = 0.75x
Now,
From 2017 to 2018, the population of city P increases by 10% and the population of city Q increases by 20%.
Sum of populations of cities P and Q in 2018 was 160000.
So,
1.1x + 1.2 × 0.75x = 160000
⇒ 1.1x + 0.9x = 160000
⇒ x = 80000
⇒ Population of city P in 2017 = 80000
∴ Statements I and II together are required to answer the question.