Question

the selling price of 12 pens is equal to the cost of 15 pens find the gain percent​

Answer 1

Answer:

Step-by-step explanation:

Now,cp of 12pens=sp of 15pens

=12y=15x

=Y/x=12/15

Gain=sp-cp

RS=y-x

Since. Gain%=gain

Cp ×100

=(Y+x)/y×100

=1+x/y ×100

=1+12/15 ×100

=27/15 ×100

=180is your answer.

Answer 2

Given,

SP of 12pens =CP of 15pens

Let the SP of 1 pen be=₹100

The SP of 12 pens=12×₹100

=₹1200

And

A/Q, CP of 15 pens=₹1200

CP of 1 pen=₹1200/15

=₹80

Therefore, SP>CP

Profit=SP—CP

=₹100—₹80

=₹20

Therefore,

Profit%=Profit ×100% whole divided byCP

=₹20 ×100%(cancel it)
..........
₹80

=20%