Question

shelf A has 4/5 of the number of books that shelf B has .if 25%of the books in A are transferred to B and then 25% of the books from B are transferred to A, then the percentage of the total number of books that A will have is.???
A. 25
B. 50
C. 75
D. 100​

Answer 1

Answer:

i know the answer the answer is 100

Answer 2

Answer:

let no. of books in shelf B =100

therefore no. of books in Shelf A=80

on transferring 25% of books from A to B = 80/4=20

i.e =100+20=120

books that are there in A Shelf =60 now

on transferring 25% of books to A is 120/4=30

books that A has = 60+30=90

total number of books =180

%required=

90/180×100=50%