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According to the chart above, the average (arithmetic mean) revenue pe

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According to the chart above, the average (arithmetic mean) revenue pe  [#permalink]

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New post 30 Aug 2018, 00:27
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  15% (low)

Question Stats:

88% (01:40) correct 13% (01:43) wrong based on 30 sessions

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Weekly Revenue Per Product Category at Office Supply Store X
Product CategoryWeekly Revenue
Pens$164
Pencils$111
Legal pads$199
Erasers$38
Average (arithmetic mean) of categories above$128

According to the chart above, the average (arithmetic mean) revenue per week per product category is $128. However, there is an error in the chart; the revenue for Pens is actually $176, not $164. What is the new, correct average revenue per week per product category?

(A) $130
(B) $131
(C) $132
(D) $164
(E) $176

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WE: Supply Chain Management (Energy and Utilities)
Re: According to the chart above, the average (arithmetic mean) revenue pe  [#permalink]

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New post 30 Aug 2018, 00:46
Bunuel wrote:
Weekly Revenue Per Product Category at Office Supply Store X
Product CategoryWeekly Revenue
Pens$164
Pencils$111
Legal pads$199
Erasers$38
Average (arithmetic mean) of categories above$128

According to the chart above, the average (arithmetic mean) revenue per week per product category is $128. However, there is an error in the chart; the revenue for Pens is actually $176, not $164. What is the new, correct average revenue per week per product category?

(A) $130
(B) $131
(C) $132
(D) $164
(E) $176


Given average revenue per week=$128
Error difference=$176-$164=$12

This difference of $12 is distributed among 4 categories given in the grid. So, each category belongs to 12/4=$3.

So, correct average=128+3=$131

Ans. (B)
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Re: According to the chart above, the average (arithmetic mean) revenue pe  [#permalink]

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New post 30 Aug 2018, 01:00
It is a very basic level question.

176-164=12, which can be divided among 4 products.

3 will be added to each product, thereby the average increases from 128 to 131.

ANS:B
GMAT Club Bot
Re: According to the chart above, the average (arithmetic mean) revenue pe   [#permalink] 30 Aug 2018, 01:00
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