I have a problem in quant question from GMAT prep.
Q) - Rates for having a manuscript typed at a certain typing service are $5 per page for the first time a page is revised. If a certain manuscript has 100 pages, of which 40 were revised only once, 10 were revised twice, and the rest required no revisions, what was the total cost of having the manuscript typed?
Ans) THE WAY I HAVE SOLVED.
Total no. of pages revised once is 40, cost = 40*3=$120 -----(i)
Total no. of pages revised twice is 10, it means 20 pages revised once , cost= 20*3=$60
Total no. of pages not revised are= 100-40-20= 40 pages
Terfore, 40*5= $200
Total=200+120+60= $380
BUT ans is $680 how?????
Can any one explain it.
Q) - Rates for having a manuscript typed at a certain typing service are $5 per page for the first time a page is revised. If a certain manuscript has 100 pages, of which 40 were revised only once, 10 were revised twice, and the rest required no revisions, what was the total cost of having the manuscript typed?
Ans) THE WAY I HAVE SOLVED.
Total no. of pages revised once is 40, cost = 40*3=$120 -----(i)
Total no. of pages revised twice is 10, it means 20 pages revised once , cost= 20*3=$60
Total no. of pages not revised are= 100-40-20= 40 pages
Terfore, 40*5= $200
Total=200+120+60= $380
BUT ans is $680 how?????
Can any one explain it.
