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The table shown above represents the relationship of the working hours

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Math Revolution GMAT Instructor
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The table shown above represents the relationship of the working hours [#permalink]

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New post 01 May 2017, 02:22
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A
B
C
D
E

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67% (00:47) correct 33% (00:34) wrong based on 58 sessions

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The table shown above represents the relationship of the working hours and the number of 20 employees who participate in the project. What is the median working hour of the 20 employees?

A. 9.5
B. 10.0
C. 10.5
D. 11.0
E. 11.5

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Re: The table shown above represents the relationship of the working hours [#permalink]

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New post 01 May 2017, 04:22
MathRevolution wrote:
Attachment:
5.1.png


The table shown above represents the relationship of the working hours and the number of 20 employees who participate in the project. What is the median working hour of the 20 employees?

A. 9.5
B. 10.0
C. 10.5
D. 11.0
E. 11.5


Total Employees = 7+3+5+4+1 = 20

Median = Middle term/Average of two middle terms after arranging terms in increasing order

Here Median = Average of Hours spent by 10th and 11th person = (10+11)/2 = 10.5

Answer: Option C
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Re: The table shown above represents the relationship of the working hours [#permalink]

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New post 01 May 2017, 05:23
Median of 20 employees is mean of the 10th and 11 employee's working hours

10th employee works for 10 hrs
11th employee works for 11 hrs.

Therefore, average of 10 hrs and 11 hrs is 10.5 hours.

Hence, ans is C
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Re: The table shown above represents the relationship of the working hours [#permalink]

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New post 03 May 2017, 02:26
==> The median working hour of 20 employees is the average of 10th and 11th working hours. In other words, median working hour=(10+11)/2=10.5.

The answer is C.
Answer: C
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Re: The table shown above represents the relationship of the working hours   [#permalink] 03 May 2017, 02:26
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