navami wrote:

Advance Purchase Discount for Airline Travel

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Days Prior to departure | Percentage discount

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0-6 days | 0%

7-13 days | 10%

14-29 days | 25%

30 days or more | 40%

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The table above shows the discount structure for advanced purchase of tickets at a particular airline. A passenger bought a ticket at this airline for $1050. The ticket agent informed her that, had she purchased the ticket one day later, she would have paid $210 more. How many days beforeher departure did she purchase her ticket?

a) 6days

b) 7 days

c) 13 days

d) 14 days

e) 29 days

First Elim ACE b/c these choices wouldnt change the value of the ticket given the conditions.

so now try for B: 1050=.9x --> not an integer so this isn't our choice

D: 1050=.75x --> x=1400

now .9(1400) = 1260 --> and 1050+210 =1260.