mr r bought some books and pen. the ratio of the books to pens is 2.5 he give 3/4 of books to A and 34 pens to B.The ratio of pens to books that. he has is now 2:3 How many books and pens did mr r buy?
Something is not right with this question; check your numbers.
I suspect the second part should say the ratio of books to pens is now 2:3, in which case:
With p = number of pens and b = number of books we have:
