On selling 100 pens, a man gains the selling price of 20 pens. The gain per cent is
Let × be the CP of pen
SP of 100 pens = 100x
Gain of 20 Pens = 20x
CP = SP - Gain
= 100 × – 20x
= 80x
= 25%
7
On selling 100 pens, a man gains the selling price of 20 pens. The gain per cent is
Let × be the CP of pen
SP of 100 pens = 100x
Gain of 20 Pens = 20x
CP = SP - Gain
= 100 × – 20x
= 80x
= 25%