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In a group of 60 people, the average (arithmetic mean) age o

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In a group of 60 people, the average (arithmetic mean) age o [#permalink] New post 02 Dec 2018, 05:35
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In a group of 60 people, the average (arithmetic mean) age of the 40 females is 60, and the average age of the 20 males is 70.


Quantity A
Quantity B
Average age of all 60 people
65



A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given
[Reveal] Spoiler: OA

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Re: In a group of 60 people, the average (arithmetic mean) age o [#permalink] New post 05 Dec 2018, 08:59
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If there were equal number of male and female the avg would have been half the avg between male and female i.e 65 however females are more than male hence avg will drift towards female's avg and will be lower than 65
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Re: In a group of 60 people, the average (arithmetic mean) age o   [#permalink] 05 Dec 2018, 08:59
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