what is a single discount equivalent to a discount series of 10% and 20%?
[A] 25
[C] 28
[B] 36
[D] 48

• Let the price be 100
  since series discount of 10% and 20%
  10/100*100=10 (10 discount we get)
  next discount of 20%
  now price is 100-10=90
  20/100*90=18 (18 discount we get)
  so we get dis of 28
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• To find overall discount equivalent to a series of discounts we use the formula
  
  (x+y-(xy/100))
  
  here x=10 and y = 20
  
  overall discount = {10 + 20 - (10*20)/100 } = 30-2 = 28 %
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• 28% is single discount
• 10 years agoHelpfull: Yes(1) No(4)
• explain it
  
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• Swagata it's a shortcut.
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