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Div A, Div B (GPREP)

Expert replies
by aj5105 » Wed Jul 08, 2009 5:09 am
In 1995 Division A of Company X had 4 850 customers. if there were 86 service errors in Division A that year, what was the service-error rate, in number of service errors per 100 customers, for Division B of company X in 1995 ?

(1) In 1995, the overall service-error rate for Divisions A and B combined was 1.5 service errors per 100 customers

(2) In 1995 Division B had 9350 customers, none of whom were customers of Division A


From Statement (1)

(86 + x ) / (4850 + B) = 1.5 / 100

Where x = errors in Division B, B = customers in B.

Not Sufficient.

Is the above equation right?


From Statement (2)

We get B. Not Sufficient.


(1) + (2)

x is the only unknown. We can find x and later service errors per 100 customers.
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Source: — Data Sufficiency |

by shibal » Wed Jul 08, 2009 4:51 pm
IMO C

1st stmt we don't have b's customers...

2nd we don't have the errors made by div b.

combined we can find it....
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by nervesofsteel » Thu Jul 09, 2009 1:28 am
IMO B

we have

85+Errors in B = 1.5/100*((4 850+9350))

thus ans is errors in B/9350
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by rajanyadav » Thu Jul 09, 2009 3:26 pm
nervesofsteel wrote:IMO B

we have

85+Errors in B = 1.5/100*((4 850+9350))

thus ans is errors in B/9350
You don't know about 1.5 in B.
So it has to be C
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by nervesofsteel » Thu Jul 09, 2009 11:30 pm
rajanyadav wrote:
nervesofsteel wrote:IMO B

we have

85+Errors in B = 1.5/100*((4 850+9350))

thus ans is errors in B/9350
You don't know about 1.5 in B.
So it has to be C
Sorry I used both 1) and 2) and still marked the ans as B..

MY bad.... ans should be C...
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by ketkoag » Sat Jul 11, 2009 2:11 am
C should be the answer..
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by gmat740 » Sat Jul 11, 2009 2:59 am
IMO-A

What is the OA?
the service-error rate, in number of service errors per 100 customers :
For "A"

(86/4850)*100
Now let the error rate for "B" be x

thus,

(86/4650)*100 + x = 1.5

Clearly we can calculate x

so A
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by aj5105 » Mon Jul 13, 2009 9:06 pm
OA (C) [lachka labak]
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by Sher1 » Tue Jul 14, 2009 6:41 am
A can't be the answer because we do not know if any customers overlap in St 1
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by sreak1089 » Tue Jul 14, 2009 7:43 am
My equation would be:

1.5% = (86+x)/(4850+y) * 100

stmt # 1: Supplies 1.5% in the above eqn.
stmt # 2: Supplies y in the above eqn.

Together, we will be able to find x. Thus C is the answer.
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