Mr. X lost a wallet containing 120Tk. Incidentally, he had only notes of Tk. 2 and Tk. 5 denominations in the wallet. If the total number of notes was 30, how many Tk. 5 denomination notes did he have?
সমাধান
সঠিক উত্তর: Option D
suppose,
number of 5 tk note =x
number of 2 tk note =30-x
here, 5x+2(30-x)=120
or,5x+60-2x=120
or,3x=60 or,x=20
so,total 5 tk note =20
