Then surely the only "correct" answer is to say the second child has an indeterminate number of red balloons? Concluding it has 2 balloons is wrong imo, its an

Then surely the only "correct" answer is to say the second child has an indeterminate number of red balloons? Concluding it has 2 balloons is wrong imo, its an answer which is not supported by any of the information supplied in the question