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At Company R, the average (arithmetic mean) age of executive employees

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At Company R, the average (arithmetic mean) age of executive employees  [#permalink]

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New post 26 Feb 2017, 03:16
3
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

72% (01:09) correct 28% (01:16) wrong based on 74 sessions

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At Company R, the average (arithmetic mean) age of executive employees is 54 years old and the average age of non-executive employees is 34 years old. What is the average age of all the employees at Company R?

(1) There are 10 executive employees at Company R.
(2) The number of non-executive employees at Company R is four times the number of executive employees at Company R.

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Re: At Company R, the average (arithmetic mean) age of executive employees  [#permalink]

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New post 26 Feb 2017, 03:55
Required Average = (54E + 34NE)/(E + NE)

St1: E = 10 --> Clearly insufficient as we have no info about NE.

St2: NE = 4E. We can substitute the value of NE to get a distinct value.
Sufficient.

Answer: B
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Re: At Company R, the average (arithmetic mean) age of executive employees  [#permalink]

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New post 08 Jan 2019, 08:44
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Re: At Company R, the average (arithmetic mean) age of executive employees   [#permalink] 08 Jan 2019, 08:44
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At Company R, the average (arithmetic mean) age of executive employees

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