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# ds: Word problem

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Senior Manager
Joined: 22 Jun 2005
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Location: London
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ds: Word problem [#permalink]  29 Apr 2006, 06:51
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Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
In 1995 Division A of Company X had 4850 customers. If there were 85 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 customer.
2, In 1995 Division B had 9350 customers, none of whom were customers of Division A.
Intern
Joined: 28 Jan 2005
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Service error rate in div A=86/4850 *100=1.77

statement 1:
Combined Service Error rate=1.5 but no mention of total number of Customers or the number of customer in Div B. Insufficient.

Statement2:
No. of Customers=9350 in Div B but no mention of Service errors so not possible to find no. of errors per 100 customers. Insufficient.

Combining Both the statements,
Total no. of customers=9350+4850=14200
Service error/100 customer= 1.5
Total no. of service error=1.5*14200/100
=213
Service error in B=213-86=127
service error/100 customer in B = (127/9350) *100
=1.35(ANS)(C)
Manager
Joined: 27 Mar 2006
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Agree with C
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