Question

if selling of 10 pens is equal to,the coast price of 14 pens find the gain per cent​

Answer 1

Step-by-step explanation:

Let the CP of 1 pen be Rs x

Then,

CP of 14 pens will be 14×x=14x

And

CP of 14 pens=SP of 10 pens

Hence,

SP of 10 pens =14x

Then,

SP of 1 pen=14x÷10=1.4x

Gain=SP−CP.=1.4x−x=Rs0.4x

Gain(%)= gain/CP×100

=0.4x/x × 100 = 40%