Give, the ratio of the charges is 1:2.
From Newton's third law, for every action, there is an equal and opposite reaction. That is the force exerted by q₁ on q₂ is equal to the force exerted by q₂ on q₁. But these forces will be in the opposite directions.
Therefore the raion of the magnitude of the force on q₁ to the magnitude of the force on q₂ is 1:1
