Q 31 A shopkeeper bought 100 watches and 100 fans each item costing 4000.
He sold each watch at a loss of 4% and each fan at a gain of 6%. Find his loss or
gain percent on the whole transaction. Also find total profit or loss.
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Answer:
C.P. of 100 watches = Rs 100× 4000 = Rs400000
C.P. of 100 fans = Rs 100 × 4000 = Rs400000
Total CP of watches and fans = 400000+400000
= Rs800000
SP of 100 watches = CP - 4% of 400000
= 400000 - 4/100×400000
=400000 - 16000 = Rs384000
SP of 100 fans = CP + 6% of 400000
= 400000 + 6/100×400000
= 400000+24000=424000
Total SP of watches and fans= 384000+424000
= 808000
Gain = SP - CP
= 808000-800000
= Rs8000
Profit % = Profit /CP ×100
= 8000/400000×100
= 2%
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