Given data:
Assume x is the high quality beans, then (130-x) is cheap quality beans.
The expression for teh total cost of the coffee is,
4.75(x)+2(130-x)=3.48(130)
2.75x=452.4-260
2.75x=192.4
x=69.9636
x=70 pound
and cheap qualiity beans is (130-70)=60 pounds.
Thus, high quality beans is 70 pouns