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  1. If 10% loss is made on selling price, then the percentage of loss on the cost price will be
    1. 11
      1
      %
      9
    2. 9
      1
      %
      11
    3. 10%
    4. 11%
Correct Option: B

Given that , Loss% = 10% ( on selling price )
Loss = C.P - S.P.
According to the question,

Loss% =
C.P - S.P.
S.P.

Where C.P. = Rs. p and S.P. = Rs. q
10
=
p - q
=
1

100q10

⇒ 10p – 10q = q
⇒ 10p = 11q
At C.P. ,
Loss% =
p - q
× 100
p


Loss% =
11p - 10p
× 100 =
100

11p11

Loss% = 9
1
%
11



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