Question

18. I have
a
total of 120 in
60. How many coins of each denomination
are with me ?
denomination of 1, 2 and 5. The
number of 2 coins is double the number
of 5 coins. The total number of coins is​

Answer 1

Answer:

Total=rupees 120

total no. of coins=60

let,no. of 5 rupees coins=x

so,no.of 2 rupees coins=2x

and,no.of 1 rupee coins=[ 60-(x+2x)]

A.T.Q,

5x+[2(2x)]+[60-(x+2x)]=120

5x+4x+60-3x=120

12x+60=120

12x=120-60

12x=60

x=60/12

x=4

so,

5 rupees coin=x=4

2 rupees coin=2x=8

1 rupee coin=60-(x+2x)=60-(4+8)=60-12=48.

Hence,5 rupees coin=4coins,2 rupees coins=8 coins,1 rupee coin=48