Question

3. Peter sells two watches for 198 each; gaining 20% on one and losing 20% ont
other. Find his gain % or loss % on the whole.​

Answer 1

Answer:

neither profit nor loss ,

loss=-20%

gain=+20%

total=20-20=0%

plz mark me as brainliest

Answer 2

Question

1. Peter sells two watches for Rs.198 each; gaining 20% on one and losing 20% on the other. Find his gain % or loss % on the whole.

Solution

 For one watch :   S.P = Rs.198 and gain = 20%

                               $\sf{=>C.P =\dfrac{100}{(100+20)} \times Rs.198$  

                                     = Rs.165  

Formula used:-

$\sf{C.P=\dfrac{100}{(100+gain\%)} \times S.P$                

For the other watch :   S.P = Rs.198 and loss = 20%

                                        $\sf{=> C.P = \dfrac{100}{(100-20)} \times Rs.198$

                                             = Rs.247.50

Formula used:-

$\sf{C.P =\dfrac{100}{(100-loss\% )} \times S.P$

Total C.P of both the watches = Rs.165 + Rs.247.50 = Rs.412.50

Total S.P of both the watches = Rs.198 + Rs.198 = Rs.396

      ⁂ Loss on the whole = Rs.412.50 - Rs.396 = Rs.16.50

                 $\sf{and, \: loss \% \: on \: the \: whole=\dfrac{16.50}{412.50} \times 100\%=4\%}$