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GRE Math Challenge #99-What is the cost, in cents, of using
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09 May 2015, 11:52
09 May 2015, 11:52
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Question Stats:
34% (00:48) correct
65% (01:00) wrong based on 38 sessions
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What is the cost, in cents, of using a certain fax machine to send n pages of a report if the total cost for sending the first k pagers is r cents and the cost for sending each additional page is s cents?
(Assume that n > k.)
(A) r + s (n - k)
(B) r + s (n + k)
(C) rs(n + k)
(D) kr + s(n - k)
(E) kr + ns
(Assume that n > k.)
(A) r + s (n - k)
(B) r + s (n + k)
(C) rs(n + k)
(D) kr + s(n - k)
(E) kr + ns
Re: GRE Math Challenge #99-What is the cost, in cents, of using
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21 Mar 2017, 13:50
21 Mar 2017, 13:50
Can anyone please guide how to solve this problem?
Thank you!
Thank you!
Re: GRE Math Challenge #99-What is the cost, in cents, of using
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22 Mar 2017, 22:19
22 Mar 2017, 22:19
Expert Reply
Explanation
Total number of pages = n
Cost for sending the first k pages = r cents.
Number of pages left after sending k pages = (n - k) pages
Cost to send a single page after first k pages = s cents
Cost for sending the (n - k) pages = s(n - k) cents .
Total cost of first k pages and (n -k) pages = r + s (n - k) cents
Hence option A is correct.
Total number of pages = n
Cost for sending the first k pages = r cents.
Number of pages left after sending k pages = (n - k) pages
Cost to send a single page after first k pages = s cents
Cost for sending the (n - k) pages = s(n - k) cents .
Total cost of first k pages and (n -k) pages = r + s (n - k) cents
Hence option A is correct.
