2 oranges, 3 bananas and 4 apples cost Rs.15. 3 oranges, 2 bananas, and 1 apple costs Rs 10. What is the cost of 3 oranges, 3 bananas and 3 apples?
(a) Rs10 (b) Rs15 (c) Rs20 (d) Rs25

• ans is b)15
  2 o + 3 b+4 a=15
  3 o + 2 b+1 a=10
  ---------------
  5 0 + 5 b+5 a=25
  therefore o+b+a=5
  3o+3b+3a=15
• 14 years agoHelpfull: Yes(30) No(1)
• Take the variables, oranges=x, bananas=y, apples=z.
  by hypothesis, 2x+3y+4z=15 and 3x+2y+z=10,
  adding these equations, 5x+5y+5z = 25 => 5(x+y+z)=25 => x+y+z=25/5=5,
  So,3x+3y+3z = 3(x+y+z)=3(5)=15,
  Therefore, cost of 3 oranges, 3 bananas and 3 apples is RS.15
• 14 years agoHelpfull: Yes(7) No(1)
• 15
• 14 years agoHelpfull: Yes(2) No(2)
• 3*ORAN+2B+1A=10
  2*ORAN+3B+4A=15
  ---------------
  ORAN+B+A=5
  3*ORAN+3B+3A=15
• 14 years agoHelpfull: Yes(1) No(0)
• 5 orange 5 banana 5 appple cost=25
  1 orange 1 banana 1 apple cost=5
  3 orange 3 banana 3apple cost=15(b)
• 14 years agoHelpfull: Yes(1) No(0)