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In a small snack shop, the average (arithmetic mean) revenue
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25 Aug 2020, 07:48
25 Aug 2020, 07:48
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In a small snack shop, the average (arithmetic mean) revenue was $400 per day over a 10-day period. During this period, if the average daily revenue was $360 for the first 6 days, what was the average daily revenue for the last 4 days?
A. $420
B. $440
C. $450
D. $460
E. $480
A. $420
B. $440
C. $450
D. $460
E. $480
Re: In a small snack shop, the average (arithmetic mean) revenue
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25 Aug 2020, 07:49
25 Aug 2020, 07:49
Expert Reply
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Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
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Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
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Re: In a small snack shop, the average (arithmetic mean) revenue
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25 Aug 2020, 08:44
25 Aug 2020, 08:44
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Carcass wrote:
In a small snack shop, the average (arithmetic mean) revenue was $400 per day over a 10-day period. During this period, if the average daily revenue was $360 for the first 6 days, what was the average daily revenue for the last 4 days?
A. $420
B. $440
C. $450
D. $460
E. $480
A. $420
B. $440
C. $450
D. $460
E. $480
If the average (mean) daily revenue over 10 days is $400/day, then the TOTAL 10-DAY REVENUE = (10)($400) = $4000
The average daily revenue for the first 6 days is $360. So, the TOTAL 6-DAY REVENUE = (6)($360) = $2160
So, the TOTAL REVENUE for the last 4 days = $4000 - $2160 = $1840
So, the AVERAGE daily revenue for those 4 days = $1840/4 = $460
Answer: D
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