12 copies of a book were sold for Rs.1800/- thereby gaining cost price of 3 copies. The cost price of a copy is :
12 copies of a book were sold for Rs.1800/- thereby gaining cost price of 3 copies. The cost price of a copy is : 1). Rs.120/- 2). Rs.150/- 3). Rs.1200/- 4). Rs.1500/-
SSC CGL Books
2 answers
Answered by
Guest on
2018-01-24 06:14:40 | Votes
31 |
#
Let the cost price of 1 book be x
$\therefore$ Cost price of 3 books =3x
and cost price of 12 books =12x
Selling Price of 12 books= 1800
=12x+3x=15x
$\Rightarrow$ 15x=1800
$\therefore x=\frac{1800}{15}=120$
The cost of each book = 120 Rs.
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