Question

5. I have a total of Rs300 in coins of denomination Rs1, Rs2 andRss. The
number of Rs 2 coins is 3 times the number of Rs5 coins. The total number of
coins is 160. How many coins of each denomination are with me?​

Answer 1

Step-by-step explanation:

let x,y,z be the no. of coins of 1, 2 and 5 resp

means we have

x+2y+5z=300

and

x+y+z=160

and

y=3z implies x=160-4z

so from first equation,

160-4z+6z+5z=300

7z=140

z=20 coins of 5

y=60 coins of 2

x=160-80=80 coins of 1