Given data:
The amount of special drink for party is A=2 l.
The amount of canberry juice is c=0.35 l.
The amount of water is w=1.2 l.
The total amount of juice is,
t=c+w
=0.35 l+1.2 l
=1.55 l
The given amount less than 2 l .
A-t=2 l-1.55
=0.45 l
Thus, the given juice is less than 2 litre of special drink by 0.45 litre.