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14 Sep 2025, 06:40
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C
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Difficulty:
5%
(low)
Question Stats:
95% (01:13) correct
5%
(01:41)
wrong
based on 172
sessions
History
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A developer sold 20 percent fewer houses in October than in September and 50 percent more houses in November than in October. If the developer sold H houses in September, which of the following represents the number of houses the developer sold in November?
(A) 0.3H
(B) 0.7H
(C) 1.2H
(D) 3H
(E) 7H
(A) 0.3H
(B) 0.7H
(C) 1.2H
(D) 3H
(E) 7H
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14 Sep 2025, 07:39
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AniketK2000
Two ways to solving
1. Using smart numbers
Let's assume that the developer sold 100 houses in September.
H = 100
Quote:
Houses sold in October = \((1-\frac{20}{100}) * 100 = 80\)
Quote:
Houses sold in November = \((1+\frac{50}{100}) * 80 = 120\)
Quote:
We know that, H = 100, therefore
120 = 1.2H
Option C
2. Algebra
Number of house sold in September = H
Quote:
Houses sold in October = \((1-\frac{20}{100}) * H = 0.8H\)
Quote:
Houses sold in November = \((1+\frac{50}{100}) * 0.8H = 1.2H\)
Option C
14 Sep 2025, 09:38
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