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On 3 sales Tom has received commissions of $200, $90, and $130, and ha

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On 3 sales Tom has received commissions of $200, $90, and $130, and ha [#permalink]

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New post 12 May 2017, 05:01
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Question Stats:

88% (00:40) correct 12% (02:34) wrong based on 24 sessions

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On 3 sales Tom has received commissions of $200, $90, and $130, and has one additional sale pending. If Tom is to receive an average (arithmetic mean) commission of exactly $165 on the 4 sales, then the 4th commission must be

A. 75
B. 140
C. 160
D. 200
E. 240

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Re: On 3 sales Tom has received commissions of $200, $90, and $130, and ha [#permalink]

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New post 12 May 2017, 06:06
Bunuel wrote:
On 3 sales Tom has received commissions of $200, $90, and $130, and has one additional sale pending. If Tom is to receive an average (arithmetic mean) commission of exactly $165 on the 4 sales, then the 4th commission must be

A. 75
B. 140
C. 160
D. 200
E. 240


Average of the commission received in 1st 3 sales = (200+90+130)/3 = 140
From the 4th sale, we need to increase the average to 165
Difference = 165-140 = 25

So 4th commission should be : 140 + 25 x4 = 240

Answer E

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Re: On 3 sales Tom has received commissions of $200, $90, and $130, and ha   [#permalink] 12 May 2017, 06:06
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On 3 sales Tom has received commissions of $200, $90, and $130, and ha

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