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20 Aug 2019, 06:45
Kudos
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
63% (01:49) correct
37%
(01:37)
wrong
based on 182
sessions
History
Date
Time
Result
Not Attempted Yet
Law firm A receives cost by charging a fixed cost $a plus an additional expense $b per hour and law firm B receives cost by charging a fixed cost $c plus an additional expense $d per hour. For a certain legal action, is the total cost received by law firm A less than the cost received by law firm B?
1) a+b < c+d
2) each of law firms A, B has worked 10 additional hours
1) a+b < c+d
2) each of law firms A, B has worked 10 additional hours
20 Aug 2019, 15:24
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GKomoku
a+b < c+d doesnt give a picture whether a + h1.b is > c + h2 d. No. of hours h1 and h2 for the two firms can be anything which will influence the result.
So 1 is not sufficient.
2. a + 10b > c + 10 d .. a, b, c and d can be anything.....so we cannot find which cost is greater.
Even if we combine 1 and 2
Firm 1 cost - a+10b,
Firm 2 cost - c + 10 d
Now if a+b < c +d, the comparison has to be for 9b and 9d means between b and d. So b can be greater than d or less than d.
So even after combining 1 and 2, the question could not be answered.
Hence E.
30 Apr 2025, 07:58
Kudos
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St1 + St2:
is a+ 10b < c +10d ?
from St1, we know a+b < c+d
lets take a=2, b=1, c=3, d=10 as 2+1 < 3+10
now 2 + 10 < 3+100 ---> YES
lets take a=1, b=10, c=12, d=1 as 1+10 < 12+1
now 1+100 > 12+10 ---> NO
therefore, Not sufficient --> E
is a+ 10b < c +10d ?
from St1, we know a+b < c+d
lets take a=2, b=1, c=3, d=10 as 2+1 < 3+10
now 2 + 10 < 3+100 ---> YES
lets take a=1, b=10, c=12, d=1 as 1+10 < 12+1
now 1+100 > 12+10 ---> NO
therefore, Not sufficient --> E
GKomoku
