A bookstore sells new books for $15 each and used books for $10 each. On every new book, the store makes a profit of $5 while on every used book it makes a profit of $2. If on a given day the bookstore's sales amounted to $125, which of the following cannot be the profit made on that day?
Guys, how to find the maximum book sold? Thanks!
answer is E - 41
41 can be 35 + 6;25+16;15+26;5+36 which leaves the number of books sold as 7 new+3 old;5 new+8 old:3 new+13 old;1 new +18 old and all these cost prices is not equal to 125$ hence E is not possilbe