Question 7
In the plane there are 2011 pairwise distinct points colored either blue or red.
a. Suppose that for every blue point the disk centered at that point with radius 1 contains exactly two red points. What is the largest possible number of blue points?
b. Suppose that for every blue point the circle centered at that point with radius 1 contains exactly two red points. What is the largest possible number of blue points?
a. Suppose that for every blue point the disk centered at that point with radius 1 contains exactly two red points. What is the largest possible number of blue points?
b. Suppose that for every blue point the circle centered at that point with radius 1 contains exactly two red points. What is the largest possible number of blue points?