Question

12. Ahmed purchased 100 hens for 8000. He sold 20 of them at a profit of 5%. For how much gain percent
should he sell the rest of hens so that he may make a profit of 20% on the whole transaction.​

Answer 1

Step-by-step explanation:

cist of 100 hens is Rs8000

cost of 20 hens is Rs 8000/100*20=Rs 1600

he sold 20 hens at a profit of 5%

selling price of 20 hens is Rs (1600+1600×20/100)=Rs(1600+320)=Rs 1920

he may make a profit of 20% on the whole transaction .

so,the selling price of 100 hens is

Rs(8000+8000×20/100)

=Rs(8000+1600)

=Rs 9600

selling price of 20 hens isRs 1920

selling price of (100-20)=80 hens is

Rs(9600-1920)

=Rs 7680

cost price of 80 hens is Rs(8000-1600)

=Rs6400

gain=Rs(7680-6400)=Rs 1280

gain %of 80 hens 1280*100/6400

=1280/64=20

he gain 20%for the rest of the hens