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Stadium tickets

by LulaBrazilia » Mon Dec 09, 2013 11:38 am
Tickets for all but 100 seats in a 10,000-seat stadium were sold. Of the tickets sold, 20% were sold at half price and the remaining tickets were sold at the full price of $2. What was the total revenue from ticket sales?

A. $15,840
B. $17,820
C. $18,000
D. $19,800
E. $21,780

How can this be done quickly?
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by Patrick_GMATFix » Mon Dec 09, 2013 11:49 am
Hey Lula,

Video solution:

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Hope that helps,
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by theCodeToGMAT » Mon Dec 09, 2013 9:30 pm
Sold = 10000 - 100 = 9900

20% were sold at half price = 1/5 * 9900 = 1980 ==> ~2000

Remaining at full price = 9900 - 1980 = 7920 ==> ~8000

Total revene = ~8000*2 + ~2000 = Just Below 18000

Answer [spoiler]{B}[/spoiler]
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by Scott@TargetTestPrep » Fri Mar 02, 2018 9:47 am
LulaBrazilia wrote:Tickets for all but 100 seats in a 10,000-seat stadium were sold. Of the tickets sold, 20% were sold at half price and the remaining tickets were sold at the full price of $2. What was the total revenue from ticket sales?

A. $15,840
B. $17,820
C. $18,000
D. $19,800
E. $21,780
0.2 x 9,900 = 1,980 tickets were sold for 1 dollar each, so these tickets generated 1,980 dollars in revenue.

9,900 - 1,980 = 7,920 were sold for 2 dollars each, so these tickets generated 15,840 dollars in revenue.

The total revenue earned was 1,980 + 15,840= 17,820 dollars.

Answer: B

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