B) A book seller purchased 100 story books at Rs 135 each. She donated 10 books to a school library. If she sold remaining books at 2% loss, find the selling price
of each book.

Number of story books bought = 100

C.P. of each book = Rs. 135

C.P. of all 100 books = Rs. (135×100)= Rs. 13500

C.P. of 90 books = Rs. (135×90)= Rs. 12150

Number of books donated = 10

Number of books sold = 100-10=90

Loss% in the transaction = 2%

S.P. of all books = (C.P./100)(100-loss%)

                         =Rs. (12150/100×98)

Thus, S.P. of each book

= Rs. {(12150/100×98)÷90}

= Rs. (12150/100×98/90)

= Rs. 132.3

Step-by-step explanation:

nos of books=100

cp=13500 total

donation=10

remaining books=90

sp=cp-Loss%of cp

sp=13500-2×135

sp=13500-270

sp=13230Rs

Is the total sp of 90 books

each book is sold at 13230/90Rs (use calculator to get result

each side has a different length.  

step-by-step explanation: