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28 Mar 2016, 02:45
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A
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Difficulty:
5%
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Question Stats:
81% (00:39) correct
19%
(00:43)
wrong
based on 134
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A baseball card decreased in value 20% in its first year and 10% in its second year. What was the total percent decrease of the card's value over the two years?
A. 28%
B. 30%
C. 32%
D. 36%
E. 72%
A. 28%
B. 30%
C. 32%
D. 36%
E. 72%
28 Mar 2016, 03:33
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Let the initial value of baseball card = 100
After first year , value of baseball card = (1- 20/100)* 100 = 80
After second year , value of baseball card =(1 - 10/100)* 80 = 72
total percent decrease of the card's value over the two years = (100-72)/100 *100%
=28%
Answer A
After first year , value of baseball card = (1- 20/100)* 100 = 80
After second year , value of baseball card =(1 - 10/100)* 80 = 72
total percent decrease of the card's value over the two years = (100-72)/100 *100%
=28%
Answer A
10 Apr 2016, 03:06
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consider the initial value of the baseball card as $100
After first year price = 100*0.8 = 80
After second year price = 80 *0.9 = 72
final decrease = [(100 - 72)/100] * 100 = 28%
correct answer - A
After first year price = 100*0.8 = 80
After second year price = 80 *0.9 = 72
final decrease = [(100 - 72)/100] * 100 = 28%
correct answer - A
