Swetha and Chaitanya went to a bookshop. Swetha purchased 5 pens, 3 note books and 9 pencils and used up all her money. Chaitanya purchased 6 pens, 6 note books and 18 pencils and paid 50% more than what Swetha paid. What % of Swethas money was spent on pens?

a) 12.5 b} 62.5 c) 75 d) cant be determined.

• let the amount spent by swetha be 'S'
  
  5p+3n+9x=S-----(1)
  
  6p+6n+18pe=1.5S---(2)
  
  
  Eq (1)x2 – Eq(2)
  
  10p + 6n + 18x = 2S
  6p + 6n + 18x = 1.5S
  ___________________
  
  4p = 0.5 S
  P = 1/8 (S)
  
  So 5p is = 5/8(S) which is 62.5%
  
  So amount spent by swetha on pencils is
  
  {[(5/8)(s)]/(s)}*100 = 62.5%
  
• 12 years agoHelpfull: Yes(14) No(1)
• let the amount spent by swetha be 'x'
  
  5p+3n+9pe=x-----(1)
  
  6p+6n+18pe=1.5x---(2)
  By solving the equations we get
  
  p=0.125x
  
  %is 12.5
• 12 years agoHelpfull: Yes(0) No(3)