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The table above shows the number of employees at each of four salary

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The table above shows the number of employees at each of four salary  [#permalink]

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New post Updated on: 22 Apr 2018, 01:38
00:00
A
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C
D
E

Difficulty:

  5% (low)

Question Stats:

87% (01:35) correct 13% (01:40) wrong based on 67 sessions

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The table above shows the number of employees at each of four salary levels at Company X. What is the average (arithmetic mean) salary for the 20 employees?

A. $23,500
B. $23,750
C. $23,900
D. $24,125
E. $24,250

Attachment:
GAMT_PS_1205.png
GAMT_PS_1205.png [ 44.56 KiB | Viewed 985 times ]

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Originally posted by 600GMAT600 on 22 Apr 2018, 01:33.
Last edited by Bunuel on 22 Apr 2018, 01:38, edited 1 time in total.
Renamed the topic and edited the question.
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Re: The table above shows the number of employees at each of four salary  [#permalink]

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New post 22 Apr 2018, 01:50
1
IRONMANGMAT wrote:
Image
The table above shows the number of employees at each of four salary levels at Company X. What is the average (arithmetic mean) salary for the 20 employees?

A. $23,500
B. $23,750
C. $23,900
D. $24,125
E. $24,250

Attachment:
GAMT_PS_1205.png


weighted average problem

avg = \(\frac{(20000*5 + 22000*4 + 25000*8 + 30000*3)}{20}\) = 23900

ans C
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Re: The table above shows the number of employees at each of four salary  [#permalink]

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New post 22 Apr 2018, 03:04
1
Remove zeros and add them later

Av=20*5 +22*4 +8*25 +30*3 /20
=23.9 multiply by 1000 =23900

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Re: The table above shows the number of employees at each of four salary  [#permalink]

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New post 16 Aug 2018, 00:49
Hi,
Simply assume that all get 20,000 then the average would have been 20,000.
Now 4 people get 2000 more than average, 8 people get 5000 more than average, 3 people get 10000 more than average
the total would be (4*2000)+(8*5000)+(3*10000)=78000
And this additional 78000 would be divided equally among 20 people

newavg= 20,000+(78000/20)
=20,000+3900
=23,900

Hence Option C

Probus
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Re: The table above shows the number of employees at each of four salary &nbs [#permalink] 16 Aug 2018, 00:49
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The table above shows the number of employees at each of four salary

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