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In a retail store, the average (arithmetic mean) sale for

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Director
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In a retail store, the average (arithmetic mean) sale for [#permalink]

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New post 07 Oct 2008, 14:38
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In a retail store, the average (arithmetic mean) sale for the month M was d dollars. Was the average (aritmetic mean) sale for month J at least 20 percent higher than that for month M?

1) For month M, total revenue from sales was $3,500.

2) For month J, total revenue from sales was $6,000.

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Re: DS: veritas prep retail store [#permalink]

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New post 07 Oct 2008, 15:17
the answer is (E)

we cannot tell the number of items sold

:)

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Re: DS: veritas prep retail store [#permalink]

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New post 08 Oct 2008, 01:20
bigtreez, is somthing missing from the question? Average sale is written as dollars without qualifying what this average is for...is this average per item, average per day, etc.? :cry:

If it appears on the real GMAT, my choice will obviously be E.

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Re: DS: veritas prep retail store [#permalink]

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New post 08 Oct 2008, 05:29
yep, I think the mean should be stated as dollars / something, doesn't it?

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Re: DS: veritas prep retail store [#permalink]

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New post 08 Oct 2008, 09:33
scthakur wrote:
bigtreez, is somthing missing from the question? Average sale is written as dollars without qualifying what this average is for...is this average per item, average per day, etc.? :cry:

If it appears on the real GMAT, my choice will obviously be E.



Thats what threw me off about this question. I assumed average per day when I shouldnt have assumed anything. The answer is E!

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Re: DS: veritas prep retail store [#permalink]

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New post 03 Nov 2008, 15:32
bigtreezl wrote:
scthakur wrote:
bigtreez, is somthing missing from the question? Average sale is written as dollars without qualifying what this average is for...is this average per item, average per day, etc.? :cry:

If it appears on the real GMAT, my choice will obviously be E.



Thats what threw me off about this question. I assumed average per day when I shouldnt have assumed anything. The answer is E!


yep, assumed per day and even went a step further calculating monthly averages using 28 and 31 days : )))

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Re: DS: veritas prep retail store [#permalink]

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New post 03 Nov 2008, 15:45
i think its E because they want you to realize that a month could have 31 days or 28 days..we dont know..

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Re: DS: veritas prep retail store [#permalink]

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New post 03 Nov 2008, 16:01
fresinha12 wrote:
i think its E because they want you to realize that a month could have 31 days or 28 days..we dont know..



if the question were to ask avg/day then using 28 days as min possible # days and 31 as max possible # of days we could show that at least 20% higher is possible, thus C.

the problem here is that we do not know what type of average we are looking for: avg/day or avg/item or avg/week?

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Re: DS: veritas prep retail store   [#permalink] 03 Nov 2008, 16:01
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