Raj earns 25% on an investment but losses 10% on another investment. If the ratio of two investment is 3:5, what is the gain or loss on the two investment taken together?
1)6.25% loss
2)13.125% gain
3)3.125% gain
4)13.125% loss

• first of all take 3:5 and multiply both by 100
  now principle of 1st investment is 300
  now principle of 2nd investment is 500
  and total investment (500+300) =800
  
  25% profit on 1st investment = 375
  10% loss on 2nd investment = 450
  
  now total after loss and profit (375+450) = 825
  that is 3.125% gain of 800
  
  ans. 3) 3.125% gain
• 9 years agoHelpfull: Yes(28) No(0)
• ans is 3.125% gain
  
  we can assume amount of investments to be 30 and 80 as they are in the ratio of 3:5.
  so on first there is gain of 25% so gain will be of 7.5 and on the other investment there is loss of 10% so loss of 5.
  so total amount is 82.5 after profit and loss. earlier it was 80
  
  so 2.5/80*100 =3.125% gain
• 9 years agoHelpfull: Yes(10) No(2)
• First Investment(CP) = 3x
  Gain%= 25%
  SP of first investment = 125% of 3x = (15x)/4
  
  Second Investment(CP) = 5x
  Loss% = 10 %
  SP of Second Investment = 90% of 5x = (9x)/2
  
  Total CP = CP of investment 1 + CP of investment 2
  = 3x+5x
  = 8x
  Total SP = SP of investment 1 + SP of investment 2
  = ((15x)/4)+(9x)/2)
  =(33x)/4
  gain% = ((SP-CP)/CP)*100 (put the corresponding values)
  = 3.125
  
• 9 years agoHelpfull: Yes(6) No(0)
• as 3:5 ratio
  let, 1st investment is 300
  2nd investment is 500
  total investment is 800
  25% profit on 1st investment = 375
  10% loss on 2nd investment = 450
  total after loss and profit 825
  which is 3.125 % of 800
  as its increases so gain.
• 9 years agoHelpfull: Yes(2) No(1)
• we could assume 3x,4x as investments
  on first one investment gain would be 3x/4 and on second one loss would be x/4.
  total profit would be x/2 .
  for 8x sum it would be 100% then for x/2 sum it would be 3,125% gain
  
• 9 years agoHelpfull: Yes(0) No(2)