By selling 12notebook the seller earn profit equal to sellng price of 2notebook wht is gain %

• Ans : 20%
  
  Let the selling price of 1 notebook is x rs .
  so , selling price of 12notebook and 2 notebook is 12x and 2 x respectively
  now let cost price of 12 notebook is y rs
  hence 12x-y = 2x => y=10x
  gain % = (2x/10x)*100 = 20% [ as gain% = (gain /cp )*100 ]
  
• 11 years agoHelpfull: Yes(4) No(0)
• 20% ans.
  s.p-c.p=gain
  so,
  s.p of 12 notebook-c.p of 12 notebook=s.p of 2 noteboook
  s.p of 10 notebook=c.p of 12 notebook
  so, gain% is=2/10*100=20% ans
  
• 11 years agoHelpfull: Yes(1) No(0)
• Answer--> 20%
  
  suppose the SP of 1 notebook is s Rs .
  so , SP of 12notebook is 12s
  SP of 2 notebook is 2s(which z equal to gain)
  CP=12s-2s=10s
  CP=10s
  gain % = (gain /cp )*100
  =(2s/10s)*100 = 20%
• 11 years agoHelpfull: Yes(1) No(0)
• Profit from 1 notebook = 1/6 Sp
  =>profit from 1 notebook =(y-x)=1/6 y
  => y=6/5x
  where y is SP and x is CP
  Now profit Margin is y-x/x *100=20%
• 11 years agoHelpfull: Yes(0) No(0)