Question
A, B, and C have salaries in the ratio 2:3:5 in the year
2018. In 2019 they got an increment of 10%, 15% and 20%, respectively. In 2020 only A got an increment of 20%. What is the ratio of their salaries in 2020?Solution
2018 salaries: A:B:C = 2:3:5 → let them be 2k, 3k, 5k 2019 (increments 10%, 15%, 20%): A = 2k × 1.10 = 2.2k B = 3k × 1.15 = 3.45k C = 5k × 1.20 = 6k 2020 (only A +20%): A = 2.2k × 1.20 = 2.64k B = 3.45k C = 6k Ratio in 2020 = 2.64 : 3.45 : 6 = 264 : 345 : 600 = 88 : 115 : 200
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