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How many people are employed at a certain manufacturing plant with an

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How many people are employed at a certain manufacturing plant with an [#permalink]

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New post 24 Jan 2016, 06:14
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Question Stats:

62% (01:07) correct 38% (01:12) wrong based on 126 sessions

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How many people are employed at a certain manufacturing plant with an annual payroll of $2,342,000?

(1) Three-fourths of the employees are clerical, at an average salary of $16,020.
(2) With 8% more employees, the payroll would equal $2,548,000.
[Reveal] Spoiler: OA

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Re: How many people are employed at a certain manufacturing plant with an [#permalink]

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New post 25 Jan 2016, 14:37
Bunuel wrote:
How many people are employed at a certain manufacturing plant with an annual payroll of $2,342,000?

(1) Three-fourths of the employees are clerical, at an average salary of $16,020.
(2) With 8% more employees, the payroll would equal $2,548,000.


One vote for E.
(1) 3/4 of employees are clerical, avg salary of $16,020. We do not know 1/4 of employees is clerical or their salaries are $16,020 too? --> insufficient
(2) We did not know the average salary the old group or did the average salary of 8% is still the same as the old one--> insufficient
(1)& (2)--> insufficient
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New post 22 Sep 2016, 09:39
Annual payroll: $2,342,000
Let Number of Employees: \(4X\)

1) Avg salary of \(3X=$16,020\) => \(3X*16020+X*Y=2342000\)
can't solve since avg salary, Y, of 1/4th is not known.

2) \(0.08*4X*Z=2548000-2342000\)
can't solve since avg salary, Z, of the new employees is not known.

1)&2): can't solve since Y and Z are independent.

Hence E.

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How many people are employed at a certain manufacturing plant with an [#permalink]

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New post 22 Oct 2017, 11:14
I usually see some DS questions like this where DEFINITE NUMBERs/ VALUEs are asked ,but only ratios/ percentage references are given in the questions as well as in the options.(like in this question the number of employees is asked but there is no reference of NUMBER OF EMPLOYEES anywhere). I usually assume, it cannot be solved with given information and select answer as E. Is there anything wrong with my assumption?

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How many people are employed at a certain manufacturing plant with an   [#permalink] 22 Oct 2017, 11:14
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