Question

By selling 90 ball pens for Rs160 a person loses 20%.How many ball pens should be sold for Rs96 so as to have a profit of 20% ?

Answer 1

Selling price of
90
pens
=
160

Loss
=
20
%

Cost price of
90
pens
=
160
×
100
80
=
200

Cost price of a pen
=
200
90
=
20
9


Suppose
x
pens should be sold for
Rs.
96
for a profit of
20
%

For this, cost price of
x
pens must be
96
×
100
120
=
80

i.e., cost price of a pen must must be
80
x


20
9
=
80
x
⇒
x
=
36

Method 2

Selling price of
90
pens
=
160

Loss
=
20
%

Cost price of
90
pens
=
160
×
100
80
=
200


For a profit of
20
%
,
selling price of
90
pens
=
200
×
120
100
=
240


i.e., With a profit of
20
%
,

90
pens can be sold for
Rs.
240

or
90
×
96
240
=
36
pens can be sold for
Rs.
96

Answer 2

mark me the brainiest please!!!!!!!