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A poll reveals that the average (arithmetic mean) income of 10 househo
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17 Sep 2018, 23:27
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Difficulty:
15% (low)
Question Stats:
91% (01:07) correct 9% (00:36) wrong based on 44 sessions
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A poll reveals that the average (arithmetic mean) income of 10 households is $25,000. If 6 of the households have incomes of $30,000 each, what is the average income of the other 4 households?
A. $21,500 B. $20,500 C. $17,500 D. $7,500 E. $7,000
Re: A poll reveals that the average (arithmetic mean) income of 10 househo
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17 Sep 2018, 23:37
Bunuel wrote:
A poll reveals that the average (arithmetic mean) income of 10 households is $25,000. If 6 of the households have incomes of $30,000 each, what is the average income of the other 4 households?
A. $21,500 B. $20,500 C. $17,500 D. $7,500 E. $7,000
total income of 10 households = 250,000 income of 6 households = 30,000 * 6 = 180,000 average income of other 4 houses =\(\frac{250,000 - 180,000}{4}\) = \(\frac{70,000}{4}\)=17,500
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18 Sep 2018, 02:53
A poll reveals that the average (arithmetic mean) income of 10 households is $25,000. If 6 of the households have incomes of $30,000 each, what is the average income of the other 4 households?
A. $21,500 B. $20,500 C. $17,500 D. $7,500 E. $7,000
step1. 25000*10=250000 (total income of 10 households)
step2. 30,000*6=180000 (total income of 6 households)
A poll reveals that the average (arithmetic mean) income of 10 househo
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18 Sep 2018, 03:56
Solution
Given:
• The average income of 10 households = $25,000 • The income of 6 households = $30,000 each
To find:
• The average income of the other 4 households
Approach and Working:
• $25,000 = sum of the incomes of all households /10
o Implies, sum of the 6 households + sum of the other 4 households = \($25,000 * 10\) o Thus, sum of the other 4 households = \($250,000 – 6 * $30,000 = $70,000\)
• Therefore, the average income of the other 4 households = \(\frac{$70,000}{4} = $17,500\)
Re: A poll reveals that the average (arithmetic mean) income of 10 househo
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19 Sep 2018, 18:08
Bunuel wrote:
A poll reveals that the average (arithmetic mean) income of 10 households is $25,000. If 6 of the households have incomes of $30,000 each, what is the average income of the other 4 households?
A. $21,500 B. $20,500 C. $17,500 D. $7,500 E. $7,000
The overall sum is 10 x 25,000 = 250,000.
The sum of 6 of the households is 6 x 30,000 = 180,000. Thus, we know that the sum of the incomes of the remaining 4 households is 250,000- 180,000 = 70,000.
So the average of those other 4 households is 70,000/4 = 17,500.
Answer: C
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Re: A poll reveals that the average (arithmetic mean) income of 10 househo
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19 Sep 2018, 20:12
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Given Average (arithmetic mean) income of 10 households is $25,000. Incomes of 6 households is $30,000 each
With the help of provided information, we can calculate Total Incomes of 6 households = 6 x 30,000 = 180,000. Total Incomes of 10 households =10 x 25,000 = 250,000. Total Incomes of other 4 households = 250,000- 180,000 = 70,000 Average of those other 4 households = 70,000/4 = 17,500
Answer: C
gmatclubot
Re: A poll reveals that the average (arithmetic mean) income of 10 househo &nbs
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91% (01:07) correct 
