Question

The selling price of 12 pens is equal to cost price of 14 pens then gain%

Answer 1

Let the CP of each pen be Rs.x.
Then,
CP of 12 pens=Rs.12
SP of 12 pens=CP of 14 pnes=Rs.14
now,gain=SP-CP=Rs.(14-12)=Rs.2
gain%=gain/cp*100
=(2/12*100)%= 50/3%
Hence,the gain= 16.666 is the ans

Answer 2

let the Cp of 1 pen b Rs1
so 14 pens cost Rs14
And 12 pens cost Rs12 which is sold at the rate of Rs14
so he gains Rs2
P%=P/CP*100
=2/14*100
= 14.4%