Chef and Ballons

why are they thinking in one way only?
ATQ, it is not guaranteed that every pick of balloon will be different. He can pick all red balloons followed by all green balloons.

yes , but we are considering the worst case that could be possible to match colours
Though there is a possibility to take same colour of balloons, but we don’t know for sure
But to make sure we win, we need to check all the possible cases to win and consider case which needs min balloons

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