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# A certain theather has 100 balcony seats- For every $2  Question banks Downloads My Bookmarks Reviews Important topics Author Message Intern Joined: 02 Aug 2003 Posts: 8 Location: FL Followers: 0 Kudos [?]: 0 [0], given: 0 A certain theather has 100 balcony seats- For every$2 [#permalink]  18 Sep 2003, 16:19
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A certain theather has 100 balcony seats- For every $2 increase in the price of a balcony seat above$ 10, 5 fewer seats will be solved. If all the balcony seats are sold when the price of each seat is $10, what is the price of a balcony seat if total revenue from the sale is$ 1360?

The answer is $12- can you pls explain? CEO Joined: 15 Aug 2003 Posts: 3465 Followers: 64 Kudos [?]: 766 [0], given: 781 Re: numbers..numbers.. [#permalink] 19 Sep 2003, 02:55 Seftali wrote: A certain theather has 100 balcony seats- For every$2 increase in the price of a balcony seat above $10, 5 fewer seats will be solved. If all the balcony seats are sold when the price of each seat is$ 10, what is the price of a balcony seat if total revenue from the sale is $1360? The answer is$12- can you pls explain?

Are you sure its 12? 12 * 95 = 1140

I got 16.

Like it or not, Under these situations, the fastest way is to plug in..Even without answer choices , it took me just under a minute.

if you wish to use an equation

(10 + x) (100-y) = 1360

It still makes sense to plug in 2 ,5 ...4,10 and 6,15 ...

i will try to solve this equation if you want.

thanks
Intern
Joined: 16 Jul 2003
Posts: 32
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I got 16 or 34.

The equation would be
(100-5x)*(10+2x)=1360.

Just to check the validity - plug in x = 1, occupied seats = 95, unit price = 12. For x=2 occ. seats = 90, unit price = 14.
So now when solved, we get x=3 or 12.

Thus unit price can be 10+2*3 = 16 or 10+2*12 = 34.

Pls. let me know if this is correct !
CEO
Joined: 15 Aug 2003
Posts: 3465
Followers: 64

Kudos [?]: 766 [0], given: 781

tsg wrote:
I got 16 or 34.

The equation would be
(100-5x)*(10+2x)=1360.

Just to check the validity - plug in x = 1, occupied seats = 95, unit price = 12. For x=2 occ. seats = 90, unit price = 14.
So now when solved, we get x=3 or 12.

Thus unit price can be 10+2*3 = 16 or 10+2*12 = 34.

Pls. let me know if this is correct !

True!

I would use the answer choices.. only one of these two solutions will be mentioned in the answer choices...OR maybe the choices can read 16 or 34 ...12 and 45...something like that.

Thanks for the complete solution.
Intern
Joined: 02 Aug 2003
Posts: 8
Location: FL
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Kudos [?]: 0 [0], given: 0

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