Answer: The required quantity of water that left is 1.26 liter.
Step-by-step explanation: Given that Eric had 2 liters of water. He gave 0.42 liter to his friend and then drank 0.32 liter.
We are to find the quantity of water that left.
The quantity of water that Eric gave to his friend, q = 0.42 liter
and
the quantity of water that Eric drank, Q = 0.32 liter.
Since Eric had 2 liter of water, so the quantity of water that left is given by
[tex]2-(q+Q)\\\\=2-(0.42+0.32)\\\\=2-0.74\\\\=1.26~\textup{liter}.[/tex]
Thus, the required quantity of water that left is 1.26 liter.
