Question

Shelf A contains 4/5 of the books contained in the shelf B. What will the percentage of the all books in shelf A if 25% of the booksin shelf A are transferred to shelf B and vice versa

Answer 1

Answer: let books in B are x

Then A has (4/5)(x) books

If 25% of books from A to B

i.e. (25/100)*(4/5)*(x)

=(1/4)(4x/5)

=(X/5)

Then B has x+(x/5)

6x/5 books similarly

Then Books In A will become 21x/20