To obtain a mixture that has 20% Syrup, we must combine 4 gallons of water with 2 gallons of Syrup.
To obtain a compound of 20% Syrup we must mix 4 gallons of water with 2 gallons of Syrup.
This is because Syrup has a concentration of 60% Syrup, so if we mix two gallons of syrup with four gallons of water we will have a compound of 6 gallons with 20% syrup as specified in the following mathematical operation.
According to the above, the total compound will have 20% syrup.
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