Question

Christmas cards are brought at Rupees 1500 per 100 and sold at rupees 200 a dozen. find the gain percent

ans this question quickly plz​

Answer 1

Rs1500 =100 cards

1 card=Rs15

so 12×15=180 per dozen-cp

But he sold it at 200 per dozen...

so gain =20 rupees

gain %= gain/cp×100

20÷180×100

= 11.11% Maybe

Answer 2

100 cards = Rs. 1500

1 card = 1500/100

          = Rs. 15

Therefore,

12×15= Rs.180 per dozen

But he sold it at Rs.200 per dozen...

so gain = Rs.20

Gain%= gain/cp×100

= 20÷180×100 = 11  1/9

          Answer = 11.11%