When the price of a pair of shoes is decreased by 10%,the number of pairs sold increased by 20%.what is net effect on sales?
a)8% decrease
b)8%increase
c)10%increase
d)10%decrease

• = -x+y-xy/100
  = -10+20- 10*20/100
  = 10- 2
  =+8% so increased
• 8 years agoHelpfull: Yes(24) No(3)
• Let the S.P be Rs 100 / shoe
  Let 100 shoes are sold out
  cost of shoe 10% decreased = ( 100- 10)= 90 Rs
  20% Increase in sales therefore 120 shoes sold out
  90*120=10800
  100*100=10000
  therefore (10800-10000)/100=800
  => 8% increase in sales
  
  
  
• 8 years agoHelpfull: Yes(22) No(0)
• net profit=x% increase and y% increase =x+y+(xy/100)
  net profit=x%increase and y% decrease =x-y-(xy/100)
  here x%increase and y % decrease
  so apply seconf formula
  20-10-((20)(10)/100)=20-10-(2)=10-2=8% increase
• 8 years agoHelpfull: Yes(4) No(0)
• Ans Option b)
  for example 100 shoes each 100 rs
  total price = 10000 rs
  no of shoes sold 20% increase so 120 shoes
  price of shoes 10% decreases so 90 rs
  now new total price 120*90=10800
  % increase=(10800-10000)/10000*100
  =8%
• 8 years agoHelpfull: Yes(1) No(2)
• correct ans is 8 % increase i.e. option (b)
  
  let the selling price of each pair of shoes is 100
  new price = 100 - (10% of 100) = 90
  
  let the initial sale (at 100 rs price) be x
  then total sale = 100*x= 100x rupees
  
  now.
  to find the no. of sold shoes at rs 90 , consider increase by 20%... so it is x+(20% of x) = 6x/5
  total sale= 90*(6x/5) = 108 rupees
  
  so , (new sale - initial sale)= 108-100= 8 increase
• 8 years agoHelpfull: Yes(1) No(0)
• b)8% increase
  
  100->100-100*10/100=90 (10% decreased)
  90->90+90*20/100=108 (20% increased)
  net effect
  ((108-100)/100)*100=8% incrrease
• 8 years agoHelpfull: Yes(1) No(1)
• Formula is a-b-ab/100.
  so a is the increase %
  b is the decreased %.
  substitue ans is 12% increase
• 8 years agoHelpfull: Yes(1) No(1)
• Let C.P be Rs100
  Price Decreased by 10%,
  S.P=C.P-Loss ==> 100-10 ==> Rs90
  Price Increased by 20%
  S.P= 90+20% of 90 ==> 90+18 ==> Rs108
  Gain=108-100=Rs 8
  Gain%= (Gain/C.P) * 100 ==> (8/100)*100
  which is 8% increase.
• 7 years agoHelpfull: Yes(1) No(0)
• Ans Option b)
  for example 100 shoes each 100 rs
  total price = 10000 rs
  no of shoes sold 20% increase so 120 shoes
  price of shoes 10% decreases so 90 rs
  now new total price 120*90=10800
  % increase=(10800-10000)/10000*100
  =8%
• 8 years agoHelpfull: Yes(0) No(0)
• price=400;
  new price after discount(10%)=360(400*10%)which is Selling price
  we know that
  SP-CP= Profit
  so
  360 - CP = 12% of 400;
  360-CP=48;
  CP=312..
  maybe :p
• 8 years agoHelpfull: Yes(0) No(0)
• answer is b
  inc of 8%
• 7 years agoHelpfull: Yes(0) No(0)
• b)8%increase
  formla a+b+ab/100
  solution -10 + 20 - 200/100
• 7 years agoHelpfull: Yes(0) No(0)
• B) 8% increase
• 6 years agoHelpfull: Yes(0) No(0)
• > suppose current price is X and current selling price is Y.
  > now price decreases by 10% so X-(10X/100)=X-0.1X= 0.9X
  >now sales increased by 20% so Y+(20Y/100)=Y+0.2Y= 1.2Y
  >net effect ON sale is 1.2*0.9=1.08
  >1.08*100=108 which shows INCREASE IN 8%
• 6 years agoHelpfull: Yes(0) No(0)