A shopkeeper allows discount of 10% on the marked price of an item but charges a sales tax of 8% on the discounted price.If the customer pays Rs.680.40 as the price including the sales tax , what is the marked price?(a)Rs.630 (b)Rs 700 (c)780 (d) none

• soln.) b
  let we assume c.p as x
  thn after discount= x*90/100
  n after sales tax= 9x/10*108/100
  so we have final value as:
  9x/10 * 108/100= 68040/100
  x=700
  
  
• 11 years agoHelpfull: Yes(8) No(0)
• let the price of item is 100
  after 10% discount the price will be=100-10=90
  tax is 8% on the discounted price=90*8/100=7.2
  now the selling price is 90+7.2=97.2.
  97.2----680.40
  100-----?
  =680.40*100/97.2
  =700
• 8 years agoHelpfull: Yes(3) No(0)
• The question says that there is a 10% discount on a particular item. Then, 8% is charged on the DISCOUNTED item.
  
  First:
  680.4/(1+0.08) = 630.
  
  Now just do the same thing, but with 10% this time:
  630/(1-0.10) (this is because it was a discount) = 700.
• 9 years agoHelpfull: Yes(1) No(0)
• let the marked price be x
  x-0.1x+0.8(x-0.1x)=680.40
  therefore x=420
  ans is d) none
• 8 years agoHelpfull: Yes(0) No(0)
• its 630 because...if marked price z x then 10% of it z .1x and 8% of .1x and .1x sums upto 680.40...now calcualte value of x ...its 630
• 7 years agoHelpfull: Yes(0) No(0)