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13 Mar 2014, 02:27
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C
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Difficulty:
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Question Stats:
88% (01:23) correct
12%
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wrong
based on 1830
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A group of store managers must assemble 280 displays for an upcoming sale. If they assemble 25 percent of the displays during the first hour and 40 percent of the remaining displays during the second hour, how many of the displays will not have been assembled by the end of the second hour?
(A) 70
(B) 98
(C) 126
(D) 168
(E) 182
(A) 70
(B) 98
(C) 126
(D) 168
(E) 182
13 Mar 2014, 02:27
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SOLUTION
A group of store managers must assemble 280 displays for an upcoming sale. If they assemble 25 percent of the displays during the first hour and 40 percent of the remaining displays during the second hour, how many of the displays will not have been assembled by the end of the second hour?
(A) 70
(B) 98
(C) 126
(D) 168
(E) 182
During the first hour 0.25*280 = 70 displays were assembled.
During the second hour 0.4*(280-70) = 84 displays were assembled.
Thus, 280 - (70+84) = 126 displays had not been assembled by the end of the second hour.
Answer: C.
A group of store managers must assemble 280 displays for an upcoming sale. If they assemble 25 percent of the displays during the first hour and 40 percent of the remaining displays during the second hour, how many of the displays will not have been assembled by the end of the second hour?
(A) 70
(B) 98
(C) 126
(D) 168
(E) 182
During the first hour 0.25*280 = 70 displays were assembled.
During the second hour 0.4*(280-70) = 84 displays were assembled.
Thus, 280 - (70+84) = 126 displays had not been assembled by the end of the second hour.
Answer: C.
13 Mar 2014, 19:20
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Answer = (C) 126
In first hour, 25% of 280 = 70
Remaining = 210
40 percent of the remaining displays during the second hour, how many of the displays will not have been assembled by the end of the second hour?
Means 60% have not been assembled
So 60% of 210 = 126
In first hour, 25% of 280 = 70
Remaining = 210
40 percent of the remaining displays during the second hour, how many of the displays will not have been assembled by the end of the second hour?
Means 60% have not been assembled
So 60% of 210 = 126
