Which is more economic, copying or buying a $12.5 book with K pages?
1). K> 85
2). Copying a book with K+15 pages will cost more than $14
1). K> 85
2). Copying a book with K+15 pages will cost more than $14
Not sufficient as it doesn't speak of monies1). K> 85
Cost for copying one page = 14/K+152). Copying a book with K+15 pages will cost more than $14
Cost for copying K pages = K*14/K+15
K*14/K+15 > 12.5 (For buying to be economical)
14k > 12.5K + 187.5
1.5K > 187.5
K > 125
So, if K > 125, then buying a K paged book is economical and if K < 125, then copying a K pages book is economical.
Not sufficient to answer.
K > 85, If K = 90 then copying a K pages book is economical and If K = 130 then buying a K paged book is economical. Insufficient to answer the question.From 1 and 2
IMO E
