T1-PS 60

[chiungfen]

60. 7189-!-item-!-187;#058&005472
Rates for having a manuscript typed at a certain typing service are $5 per page for the first time a page is typed and $3 per page each 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?

(A) $430
(B) $620
(C) $650
(D) $680
(E) $770

ans:D

喔喔~~~連續兩題都不會算…好灰心喔
請大家幫幫忙喔

[Huang Hsin-Yi]

100*5+40*3+10*3*2

sorry for the mistake!

[chiungfen]

100*5+40*3+10*3*3

這答案算出來不是680耶~~~是不是應該是"100*5+40*3+(10*3)*2
而題目是問打一頁第一次5元，而修改一頁3元，總共有100頁，40頁修改一次，10頁修改2次，而剩下的頁數沒有修改，問花了多少錢?
但我不了解為何要100*5??

請改正我的思路~~

[sunnyblue13s]

100*5 - a certain typing service are $5 per page for the first time a page / If a certain manuscript has 100 pages

[sunnyblue13s]

100*5+40*3+(10*3)*2 - o
100*5+40*3+(10*3)*3 - x