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

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Math Expert
Joined: 02 Sep 2009
Posts: 58453
According to the chart above, the average (arithmetic mean) revenue pe  [#permalink]

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30 Aug 2018, 00:27
00:00

Difficulty:

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
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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Status: Learning stage
Joined: 01 Oct 2017
Posts: 1013
WE: Supply Chain Management (Energy and Utilities)
Re: According to the chart above, the average (arithmetic mean) revenue pe  [#permalink]

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30 Aug 2018, 00:46
Bunuel wrote:
Weekly Revenue Per Product Category at Office Supply Store X
Product CategoryWeekly Revenue
Pens\$164
Pencils\$111
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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PKN

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Intern
Joined: 26 Dec 2016
Posts: 23
Re: According to the chart above, the average (arithmetic mean) revenue pe  [#permalink]

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