Question

11. A shopkeeper bought two fans for3120 each. He sold one of them at a profit of 25% and
the other at a loss of 15%. Find his gain or loss per cent in the whole transaction.
12. A shopkeeper sells two suitcases for 2400 each, gaining 20% on one and losing 20% on the
other. Find his gain or loss per cent in the whole transaction.​

Answer 1

Step-by-step explanation:

Let the cost price of one transistor is xRs.

Then cost price of another transistor=720−xRs.

Then according to the question

⇒

100

85

×x=(720−x)

100

119

⇒

20

17x

=

100

119(720−x)

⇒17x×100=119×20×(720−x)

⇒17x×5=119×(720−x)

⇒85x=85680−119x

⇒85x+119x=85680

⇒204x=85680

⇒x=

204

85680

⇒420

Hence C.P of first transistor=420Rs.

C.P of another Transistor=720−420=300Rs.