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pushpitkc
The rate of having a report ready is $10 per page for the first 50 pages and $7 per page thereafter. For revision, the rate is $4 per page for the first iteration and $3 per page for the second iteration. Ross ordered for a report of 120 pages He needed one iteration for 50 of those pages and two iterations for 20 pages. The remaining pages needed no revision. What was the bill Ross paid for the report?

A. $840
B. $1250
C. $1330
D. $1390
E. $2030

For the first 50 pages of Rob’s report, he paid 10 x 50 = 500 dollars.

For the next 70 pages, he paid 7 x 70 = 490 dollars.

He paid 70 x 4 = 280 dollars for the first iteration of 70 pages.

He paid 20 x 3 = 60 for the second iteration of 20 pages.

In total Ross paid: 500 + 490 + 280 + 60 = 1,330 dollars,

Answer: C
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pushpitkc
The rate of having a report ready is $10 per page for the first 50 pages and $7 per page thereafter. For revision, the rate is $4 per page for the first iteration and $3 per page for the second iteration. Ross ordered for a report of 120 pages He needed one iteration for 50 of those pages and two iterations for 20 pages. The remaining pages needed no revision. What was the bill Ross paid for the report?

A. $840
B. $1250
C. $1330
D. $1390
E. $2030

Source: Experts Global


so 120 pages.. first 50 page 10 and next \(70@7 = 50*10+70*7= 990\)..

Iteration....this is where one can go wrong
one iteration \(50@4=200\)
two iteration \(20@(4+3) = 20*7=140\)..

total = \(990+200+140=1330\)

C

Is it ok that it is not mentioned in a passage that 20 pages with 2 iterations were not from the set of 50 pages with 1 iteration?
Because if we do so, we get 1250 - option B.
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pushpitkc
The rate of having a report ready is $10 per page for the first 50 pages and $7 per page thereafter. For revision, the rate is $4 per page for the first iteration and $3 per page for the second iteration. Ross ordered for a report of 120 pages He needed one iteration for 50 of those pages and two iterations for 20 pages. The remaining pages needed no revision. What was the bill Ross paid for the report?

A. $840
B. $1250
C. $1330
D. $1390
E. $2030

Source: Experts Global


Is it ok that it is not mentioned in a passage that 20 pages with 2 iterations were not from the set of 50 pages with 1 iteration?
Because if we do so, we get 1250 - option B.


I have the same doubt. Could someone please verify?
Will those 50pages be exclusive of the 20 pages needing 2 iterations ?
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pushpitkc
The rate of having a report ready is $10 per page for the first 50 pages and $7 per page thereafter. For revision, the rate is $4 per page for the first iteration and $3 per page for the second iteration. Ross ordered for a report of 120 pages He needed one iteration for 50 of those pages and two iterations for 20 pages. The remaining pages needed no revision. What was the bill Ross paid for the report?

A. $840
B. $1250
C. $1330
D. $1390
E. $2030

Source: Experts Global


so 120 pages.. first 50 page 10 and next \(70@7 = 50*10+70*7= 990\)..

Iteration....this is where one can go wrong
one iteration \(50@4=200\)
two iteration \(20@(4+3) = 20*7=140\)..

total = \(990+200+140=1330\)

C

Is it ok that it is not mentioned in a passage that 20 pages with 2 iterations were not from the set of 50 pages with 1 iteration?
Because if we do so, we get 1250 - option B.

The "20" cannot be from the "50". Please read the language carefully-

"He needed one iteration for 50 of those pages and two iterations for 20 pages..."

Hope this helps.

Here is the video explanation-

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Hi, Can you explain why we multiply 20 by 4 for the 1st iteration and why not by 3 ? The question says that for those first 50 pages 1 iteration which costs 4 dollar per page so that will be 50*4 however, after that shouldn't it be 20*3+20*3 and so on

I got this wrong in the mock exam as well.
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­Preparation:
+ first 50 pages: $10/pg => total $500
+ afterwards: $7/pg

1st revision: $4/pg
2nd revision: $3/pg

------

Preparation of 120 pages => 500 + 7 * 70 = 990

50 pages were iterated once => 50 * 4 = 200

20 pages were iterated 2 times
+ 1st time: 20 * 4 = 80
+ 2nd time: 20 * 3 = 60

==> total: 990 + 200 + 140 = 1330
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