CP of 15 pens is equal …

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Yogita Ingle 7 years, 2 months ago
Let the CP of each pen be Rs.x.
Then,
CP of 12 pens = Rs.12
SP of 12 pens=CP of 15 pens = Rs.15
now ,gain = SP- CP=Rs.(15 - 12) = Rs.3
gain%=gain/cp × 100
=(3/12 × 100)% = 25%
Hence, the gain = 25%.
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