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A survey reveals that the average income of a company’s customers is $

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A survey reveals that the average income of a company’s customers is $  [#permalink]

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New post 11 Feb 2019, 04:05
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C
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  45% (medium)

Question Stats:

58% (02:06) correct 42% (02:02) wrong based on 12 sessions

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A survey reveals that the average income of a company’s customers is $45,000 per year. If 50 customers respond to the survey and the average income of the wealthiest 10 of those customers is $75,000, what is the average income of the other 40 customers?

(A) $27,500
(B) $35,000
(C) $37,500
(D) $42,500
(E) $50,000

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Re: A survey reveals that the average income of a company’s customers is $  [#permalink]

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New post 11 Feb 2019, 04:21
Bunuel wrote:
A survey reveals that the average income of a company’s customers is $45,000 per year. If 50 customers respond to the survey and the average income of the wealthiest 10 of those customers is $75,000, what is the average income of the other 40 customers?

(A) $27,500
(B) $35,000
(C) $37,500
(D) $42,500
(E) $50,000



Total = 50*45000 = 2250000

Total of 10 wealthiest = 10 * 75000 = 750000

Remaining amounts = 2250000 - 750000 = 1500000

1500000 / 40 = 37500

C is the answer.
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Re: A survey reveals that the average income of a company’s customers is $  [#permalink]

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New post 11 Feb 2019, 04:26
Bunuel wrote:
A survey reveals that the average income of a company’s customers is $45,000 per year. If 50 customers respond to the survey and the average income of the wealthiest 10 of those customers is $75,000, what is the average income of the other 40 customers?

(A) $27,500
(B) $35,000
(C) $37,500
(D) $42,500
(E) $50,000



total income sum = 45000*50 ; 2250000
wealthiest income sum = 75000*10 ; 750000
so 40 customers sum = 2250000-750000= 15*10^5
avg 15*10^5/40 = $37,500

IMO C
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Re: A survey reveals that the average income of a company’s customers is $   [#permalink] 11 Feb 2019, 04:26
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