A sum of rs. 36.90 is made up of 90coin that are either 20paise coin or 50paise coins. Find out how many 20 paise coin are there in the total amount?
A-47
B-43
C-27
D-63

• ans:c
  x+y=90
  0.2x+0.5y=36.90
  solving those two equations
  x=27 & y=63
• 11 years agoHelpfull: Yes(5) No(0)
• 36.90*100=x*20+(90-x)*50
  solving x=27 ans
• 11 years agoHelpfull: Yes(5) No(0)
• answer is c-27. solution is given below.
  let the no. of 20 paise coins be 'x' and that of 50 paise coins be 'y'
  according to question
  20x + 50y = 3690 or 2x + 5y = 369 -----eq1
  and, x + y = 90 -------eq2
  solving eq1 and eq2 for value of 'x' and 'y' we get
  x = 27 and y = 63
• 11 years agoHelpfull: Yes(3) No(1)