Question

7.
Sujata sold two watches for Rs 990 each. On one he gains 10% and on the other she
loses 10%. Find her gain or loss per cent on the whole transaction.​

Answer 1

Answer:

CP of 1st watch=Rs 990

Gain=10%

SP of 1st watch= 100+10/100(990)

=110/100(990)

=11(99)

=1089Rs

CP of 2nd watch=990

Loss=10%

SP of 2nd watch=100-10/100(990)

=90/100(990)

=9(99)

=891

Total SP= 1089+891

= 1980Rs

Total CP= 990+990

=1980Rs

CP=SP

no profit/ no loss

Profit%/Loss%= 0/CP(100)

=0/990(100)

=0(Ans)