Question
The population of a town in 2019 was 'P'. It grew by 15%
in 2020 and then by another 30% in 2021. By the end of 2021, the total population became 39,780. If the male to female ratio in 2019 was 7:8, find the number of males in the town in 2019.Solution
ATQ: P × 1.15 × 1.30 = 39,780 P = 39,780 ÷ 1.495 = 26,600 Therefore, number of males in town in 2019 = (7/15) × 26,600 = 12,412
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