Quantitative Aptitude – Arithmetic

Slot – 1 – Quantitative Aptitude – Arithmetic – The income of Amala is 20% more than that of Bimala

Q. The income of Amala is 20% more than that of Bimala and 20% less than that of Kamala. If Kamala’s income goes down by 4% and Bimala’s goes up by 10%, then the percentage by which Kamala’s income would exceed Bimala’s is nearest to?

1. 28
2. 31
3. 29
4. 32

Answer: 31

Solution: Let the income of Amala (A) = 100x , income of Bimala (B) = 100x/1.2 = 83.33 x and
Income of Kamala = 100x/0.8 = 125x
When Kamala’s income goes down by 4% and Bimala’s goes up by 10%,
K’s new income = 125x – 4% of 125x = 120x
B’s new income = 83.33x + 10% of 83.33x = 91.67 x
the percentage by which Kamala’s income would exceed Bimala’s = (120x – 91.67x)/91.67x *100
= (28.33/91.67) *100 = 31 (approx)

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