MATH F.1

a) Let x be $2,
and 1/5 x be $1,

x + 1/5 x = 30
1.2 x = 30
x = 30/1.2
= 25

therefore, there are 25 $2 in the bag and, (30-25)=
5 $1 in the bag.
therefore, the total value of $2 in the bag = 25*$2
= $ 50




b) From a),
the total value of $1 in the bag = 5*$1
=$5

c)From b),
the value of $1 to the value of all coins
5 : (50+5)
5 : 55
1 : 11