3 empty CDs and 2 pen drives cost Rs 790
2 empty CDs and 3 pen drives cost Rs 1110 What is the cost of one pen drive?
Rs30
Rs 350
Rs25
Rs 300

• Two equations can be formed here..
  
  3x + 2y = 790
  
  And
  
  2x + 3y = 1110
  
  Now solve the equations simultaneously..
  You will get the answer. ----> 350
• 8 years agoHelpfull: Yes(6) No(1)
• let p for pendrive & c for cd then
  for solving multipy equations with choosen no. to make one variable nullable
  So, i did
  
  3 * (2c + 3p = 1110 ) - 2 * (3c + 2p = 790)
  we get 5p=1750
  => p=1750/5
  .'. p=350 rs
  
• 8 years agoHelpfull: Yes(4) No(0)
• assume that x= cd and y= pendrive
  therefore 3x+2y=790---------->eqa 1
  2x+3y=1110--------->eqa 2
  by solving this euation we get x=30,y=350
  answer is 350
  cost of pendrive is Rs 350
• 8 years agoHelpfull: Yes(1) No(0)
• 350 is the ans
  3 cd + 2 pd =790
  2 cd +3 pd =1110
  on solving these equations we get pen drive cost = 350
• 8 years agoHelpfull: Yes(1) No(0)
• Rs. 350
  Let cost of CD is C
  Cost of pen drive is P
  3C+2P=790 ----------------(1)
  2C+3P=1110 ----------------(2)
  Adding these equations,we get
  5C+5P=1900
  SO, C+P=380
  C=380-P -------------------(3)
  subtracting the equations 1 & 2
  P-C=320
  Put eqn (3) in this
  P+P-380=320
  So, P=350 Rs.
• 8 years agoHelpfull: Yes(1) No(0)