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11 Oct 2019, 02:48
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C
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95% (00:42) correct
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The price of copper rose by 25 percent and then fell by 20 percent. The price after these changes was
A. 20 percent greater than the original price
B. 5 percent greater than the original price
C. the same as the original price
D. 5 percent less than the original price
E. 15 percent less than the original price
A. 20 percent greater than the original price
B. 5 percent greater than the original price
C. the same as the original price
D. 5 percent less than the original price
E. 15 percent less than the original price
11 Oct 2019, 03:29
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Bunuel
The price of copper rose by 25 percent and then fell by 20 percent. The price after these changes was
A. 20 percent greater than the original price
B. 5 percent greater than the original price
C. the same as the original price
D. 5 percent less than the original price
E. 15 percent less than the original price
A. 20 percent greater than the original price
B. 5 percent greater than the original price
C. the same as the original price
D. 5 percent less than the original price
E. 15 percent less than the original price
Let the initial price of copper = 100
Initially increased by 25% = 1.25*100 = 125
Then fell by 20% = 0.80*125 = 100 --> Same as the original price
IMO Option C
11 Oct 2019, 08:51
Kudos
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Bunuel
The price of copper rose by 25 percent and then fell by 20 percent. The price after these changes was
A. 20 percent greater than the original price
B. 5 percent greater than the original price
C. the same as the original price
D. 5 percent less than the original price
E. 15 percent less than the original price
A. 20 percent greater than the original price
B. 5 percent greater than the original price
C. the same as the original price
D. 5 percent less than the original price
E. 15 percent less than the original price
As per the question, the price 1st rose, which makes the new price as 1.25x. Then when the price falls by 20%, therefore, the new price would be 1.05x.
Hence, B.
