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An exclusive tourist charges tourists b dollars for the fir

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An exclusive tourist charges tourists b dollars for the fir [#permalink] New post 21 Mar 2013, 12:36
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An exclusive tourist resort charges tourists b dollars for the first night stay and charges a reduced rate of c dollars for every subsequent night of stay .How much does the tourist resort charge tourist for the first night stay?

1)Adam was charged 390 dollars for his 6 nights stay
2)The average( arithmetic mean) daily room rent for 3 nights' stay is 7/9 th times the rate for the first night stay .
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Re: An exclusive tourist charges tourists b dollars for the fir [#permalink] New post 21 Mar 2013, 12:59
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guerrero25 wrote:
An exclusive tourist resort charges tourists b dollars for the first night stay and charges a reduced rate of c dollars for every subsequent night of stay .How much does the tourist resort charge tourist for the first night stay?

1)Adam was charged 390 dollars for his 6 nights stay
2)The average( arithmetic mean) daily room rent for 3 nights' stay is 7/9 th times the rate for the first night stay .


b=?

1)b+5n=390
not sufficient
n=1 b=385 and so on...

2)
\frac{(b+2n)}{3}=\frac{7}{9}b

6n=4b

b=\frac{3}{2}n

not sufficient

1+2)
b+5n=390
b=\frac{3}{2}n

b=90, n=60
sufficient, C
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Re: An exclusive tourist charges tourists b dollars for the fir   [#permalink] 21 Mar 2013, 12:59
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