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Question

Find the C.P., when:
(i) S.P. = Rs. 12 ; gain=20%
(ii) S.P. = Rs. 360; loss=10%

Solution
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Let say CP=x
(1) SP=CP+P100×CP
12=x+20100×x
12=x+x5
It gives: x=10Rs
CP=10RS

(2) Let say CP=y
SP=CPL100×CP
360=y10100×y
360=yy10
It gives y=400Rs
CP=400Rs

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Find the C.P., when:
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