8. Naveen purchases 11 knives for 10 and sells them
at the rate 10 knives for 11. He earns a profit of
(a) 21% (b) 15% (c) 11%
(d) 20%
Answers
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Step-by-step explanation:
C.P. of 1 knife =
11
10
S.P of 1 knife =
10
11
Profit = S.P − C.P
Profit =
10
11
−
11
10
=
110
121−100
=
110
21
Profit % =
C.P.
profit
×100
Profit % =
11
10
110
21
×100
⇒
110
21
×
10
11
×100=21 %
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