10 the package for the books costs 5 and 10 pencils 4.50€ How Much Does A one book And One Pen Pay In Total?

This is extremely grammatically incorrect but I will try my best to answer. If a package of books has 10 books and all 10 together cost 5 euro and 10 pencils cost 4.50 euro then 5 / 10 is 0.5 euro so 0.5 + (4.50 / 10) = 0.45 euro! So your answer is 0.45 euro