Riya bought rice for Rs.50/kg and Rs.60/kg and mixed them.When she sold the rice at a rate of Rs.70/kg,she had a profit of 20%.at what ratio was the rice mixed??
a)1/5
b)1/10
c)3/8
d)2/7

• 120%*x=70
  x=175/3
  60-175/3:175/3-50=1:5
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• ans is 1/5 since mean price is 175/3
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• ans is 1/5
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• Mix x:y
  cp=50x+60y
  Sp=(50x+60y)+(50x+60y)*20/100
  So,(50x+ 60y)+(50x+60y) *20/100=70(x+y)
  x:y=1:5
  
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